Relationship of Strength and Precision in Shooting Activities

1988 ◽  
Vol 32 (18) ◽  
pp. 1294-1298 ◽  
Author(s):  
Max Vercruyssen ◽  
Eric M. Grose ◽  
Robert W. Christina ◽  
Ellen Muller
Keyword(s):  
Strength Training ◽  
Development Program ◽  
Control Group ◽  
Strength Development ◽  
Training Effects ◽  
Average Force ◽  
Individual Subject ◽  
Strength Performance ◽  
Shoulder Strength ◽  
Relationship Of

Reported is an experiment which was designed to (1) test the strength-precision relationship of grip and shoulder strength with competitive pistol shooting scores using a nationally ranked collegiate pistol team and (2) determine the effects of a very brief, specifically focused, intense grip and shoulder strength training program (10 min, 3 times per week for 8 weeks) on strength and shooting performance. All members of the Pennsylvania State University Navy ROTC Pistol Team (n = 12) were divided into two matched groups according to pre-test shooting scores. Both groups received identical shooting instruction and practice, but the training group participated in an eight-week strength development program while the control group did not. Maximum isometric strength (peak and 4-sec average force) measures were obtained from electronic output of a hand dynamometer and strain gauge (deltoid contraction from a lateral horizontal shooting position against an arm cuff). Shooting scores (slow fire, timed fire, rapid fire, and total) were used as performance measures. The 24 intense but brief exercise bouts did not produce group training effects, despite painstaking efforts to use (1) exercises documented to produce training effects, (2) subjects who were highly motivated, (3) accurate and reliable strength testing equipment, and (4) a program which exercised to fatigue each day the target muscles. This finding is particularly alarming because of the strong body of literature suggesting the effect should have occurred. It also suggest that the time spent in strength training might better be spent in shooting. Nonetheless, robust strength-performance correlations were obtained, particularly in two areas: (1) slow fire shooting scores with grip strength and (2) timed and rapid fire with deltoid strength. Furthermore, individual subject analysis revealed that those that improved in strength also improved in shooting skill. This training was effective for improving strength and scores in some subjects, especially in producing increases in deltoid strength concomitant with improvements in timed and rapid fire scores. This work has implications for all types of free-limb shooting activities, for military and civilian populations, and for novice and elite performers.

scholarly journals Effects of Maximal Strength Training on Perceived-Fatigue and Functional Mobility in Persons with Relapsing-Remitting Multiple Sclerosis

Medicina ◽  
2020 ◽  
Vol 56 (12) ◽  
pp. 718
Author(s):  
Ramon Gomez-Illan ◽  
Raul Reina ◽  
David Barbado ◽  
Rafael Sabido ◽  
Pedro Moreno-Navarro ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Strength Training ◽  
Functional Mobility ◽  
Control Group ◽  
Maximal Strength ◽  
Timed Up And Go ◽  
Strength Performance ◽  
Daily Life Activities ◽  
Fatigue Severity ◽  
Relapsing Remitting Multiple Sclerosis

Background and objectives: Fatigue is one of the most disabling symptoms that limit daily life activities in persons with multiple sclerosis (pwMS). This study aimed to evaluate the effects of maximal strength training (MST) on perceived-fatigue and functional mobility in pwMS. Materials and Methods: 26 participants with MS were balanced according to their pre-intervention fatigue scores and distributed into an MST group (n = 13) and a control group (CG; n = 13). The MST group completed eight weeks using high loads, evaluating detraining after ten weeks. Quadriceps and hamstring isokinetic (QPTIK; HPTIK) and isometric (QPTIM; HPTIM) peak torques were assessed using an isokinetic dynamometer. Effect size differences were estimated with the Hedges’ g index (dg). Fatigue was evaluated through the Fatigue Severity Scale (FSS), while functional mobility was assessed via the Timed Up and Go Test (TUG). Results: The MST significantly improved all the strength measurements after the intervention (Δ6.43–29.55%; p < 0.05) compared to the control group. FSS showed a significant reduction (59.97%, dg = 5.41, large). The MST group also reduced the TUG time (19.69%; dg = 0.93, large) compared to the control group. Improvements caused by the intervention did not remain after a 10-week follow-up, with decreases in strength performance from 4.40% to 13.86% (dg = 0.24–0.56, small to moderate), 112.08% in the FSS (dg = −3.88, large), and 16.93% in TUG (dg = −1.07, large). Conclusions: MST (up to 90% 1RM) seems to be a feasible and useful way to obtain clinically relevant improvements in the perceived-fatigue symptoms and functional mobility. Still, symptom improvements decrease after a 10-week detraining period.

scholarly journals Ankle Strength and Force Sense After a Progressive, 6-Week Strength-Training Program in People With Functional Ankle Instability

2012 ◽  
Vol 47 (3) ◽  
pp. 282-288 ◽  
Author(s):  
Brent I. Smith ◽  
Carrie L. Docherty ◽  
Janet Simon ◽  
Joanne Klossner ◽  
John Schrader
Keyword(s):  
Strength Training ◽  
Athletic Training ◽  
Ankle Instability ◽  
Training Group ◽  
Ankle Injuries ◽  
Control Group ◽  
Strength Development ◽  
Functional Ankle Instability ◽  
Group 10 ◽  
Force Sense

Context: Although strength training is commonly used to rehabilitate ankle injuries, studies investigating the effects of strength training on proprioception have shown conflicting results. Objective: To determine the effects of a 6-week strength-training protocol on force sense and strength development in participants with functional ankle instability. Design: Randomized controlled clinical trial. Setting: University athletic training research laboratory. Patients or Other Participants: A total of 40 participants with functional ankle instability were recruited. They were randomly placed into a training group (10 men, 10 women: age  =  20.9 ± 2.2 years, height  =  76.4 ± 16.1 cm, mass  =  173.0 ± 7.9 kg) or control group (10 men, 10 women: age  =  20.2 ± 2.1 years, height  =  78.8 ± 24.5 cm, mass  =  173.7 ± 8.2 kg). Intervention(s): Participants in the training group performed strength exercises with the injured ankle 3 times per week for 6 weeks. The protocol consisted of a combination of rubber exercise bands and the Multiaxial Ankle Exerciser, both clinically accepted strengthening methods for ankle rehabilitation. The progression of this protocol provided increasingly resistive exercise as participants changed either the number of sets or resistance of the Thera-Band or Multiaxial Ankle Exerciser. Main Outcome Measure(s): A load cell was used to measure strength and force sense. Inversion and eversion strength was recorded to the nearest 0.01 N. Force-sense reproduction was measured at 2 loads: 20% and 30% of maximal voluntary isometric contraction. Results: Increases in inversion (F1,38  =  11.59, P &lt; 0.01, ηp2  =  0.23, power  =  0.91) and eversion (F1,38  =  57.68, P &lt; .01, ηp2  =  0.60, power  =  0.99) strength were found in the training group at the posttest when compared with the control group. No significant improvements were noted in force-sense reproduction for either group. Conclusions: Strength training at the ankle increased strength but did not improve force sense.

scholarly journals Effects of Task-Specific and Strength Training on Simulated Military Task Performance in Soldiers

2020 ◽  
Vol 17 (21) ◽  
pp. 8000
Author(s):  
Tommi Ojanen ◽  
Keijo Häkkinen ◽  
Jaakko Hanhikoski ◽  
Heikki Kyröläinen
Keyword(s):  
Strength Training ◽  
Task Performance ◽  
Military Training ◽  
Training Group ◽  
Control Group ◽  
Strength Performance ◽  
Task Requirements ◽  
Physical Task ◽  
Occupational Task ◽  
The Military

A soldier’s occupational physical task requirements are diverse and varied. However, the type of physical training that most effectively improves soldiers’ occupational task requirements has not been studied previously. The purpose of this study was to determine the important strength characteristics for soldiers during a repeated simulated military task course, and the type of training that may be effective to improve these abilities during a specialized military training period. Forty-two (n = 42) soldiers participated in the study. They were divided into three training groups; a soldier task-specific training group (TSG, n = 17), a strength training group (STG, n = 15), and a control group (CON, n = 10). Participants were measured before (PRE), middle (MID) and after (POST) the 12-week training intervention for strength performance and simulated military task test. Simulated military task performance improved significantly in TSG and STG between the PRE and MID measurements (from 9.4 to 15.7%). TSG and STG improved in various spilt times, especially in strength tasks; casualty drag (from 8.3 to 13.6%) and kettlebell carry (from 13.2 to 22.4%) between the PRE and MID measurements. The present study showed that both the training of TSG and STG were more effective than the training of CON (control group) in terms of improving the performance in the repeated simulated military task course. The present study showed that training of TSG was as effective as STG to improve repeated simulated military task course time. Therefore, an optimal training combination should include high-intensity simulated military task field training and strength training programmed with consideration of the military training phase and environmental possibilities.

scholarly journals Importance of Performing Experience in Strength Training Periodization

2017 ◽  
Vol 57 (1) ◽  
pp. 1-11
Author(s):  
Adrián Novosád ◽  
Gabriel Buzgó ◽  
Peter Keszegh ◽  
Jakub Chudý ◽  
Matej Halaj ◽  
...  
Keyword(s):  
Body Weight ◽  
Strength Training ◽  
The Body ◽  
Isometric Strength ◽  
External Loading ◽  
Control Group ◽  
Strength Development ◽  
Short Term ◽  
Deep Squat

Summary Proper mastering of a training means seems to be an important determinant of the quality of strength training. Aim of the paper is to examine the differences in strength in relation to squat-performing experience and to offer a way of improving performance by means of increasing the quality of squat technique. Methods 1. Subjects were divided into two groups according to their previous experience with performing squat: a group of inexperienced (n = 9; age: 21.1 years ± 2.37; height: 179.2 cm ± 8.18; weight: 70.0 kg ± 7.38) and experienced (n = 9; age: 24.0 years ± 1.07; height: 182.1 cm ± 4.14; weight: 81.2 kg ± 4.29). We carried out a test of maximal isometric strength in deep squat (ISOmax50°) and a modified diagnostic set (Fitro Force Plate) which consisted of repetitions of heel raised deep squats with a gradually increasing external loading (FmaxBW+(0-100%)). Posture and the body segments of the participants were not corrected during these tests. Mann-Whitney U test (α=0.05) was used to evaluate the data obtained. Results 1. After comparing the differences in the maximal value of force curve in dynamic muscular mode (FmaxBW+(0-100%)) and the maximal isometric force in deep squat (ISOmax50°) between the groups we found significantly bigger differences in the group of experienced when the resistance represented +75 % (Δ 279.0 N) and +100 % of body weight (Δ 332.2 N). Methods 2. Eleven inexperienced subjects (age: 22.1 years ± 1.52; weight: 78.2 kg ± 2.84) completed a short term experiment (with 4 training sessions in weeklong microcycle). The purpose was to practise deep squat without any content of targeted strength development. No control group was included. Initial and final measurements included the rate of force development test (RFD50°,90°,140°, 0-200 ms), the maximal isometric strength test (ISOmax50°,90°,140°) and the diagnostic set for deep squat (Fitro Dyne Premium). Wilcoxon T-test was used for further analyses (α = 0.01; α = 0.05). Results 2. We found statistically significant increments of ISOmax50° (Δ 89.45 N, p < 0.01), ISOmax90° (Δ 45.63 N, p < 0.05), RFD50°(0-200ms) (Δ 0.42 N.ms-1, p < 0.05), RFD90°(0-200ms) (Δ 0.47 N.ms-1, p < 0.05) and mean power output (Pmean) of entire diagnostic set (Δ 38.8 W, p < 0.01). Conclusions. Increases in the difference in variations between the groups starting from the resistance of 50 % of body weight confirms the recommendations of using lower weights for beginners for the purpose of strength development. Based on the results we conclude that a short-term training programme of deep squat practise (without any intention of improving strength performance) has positive effect on selected strength parameters.

Plasma Levels of Lipoprotein(a) Are Elevated in Patients with the Antiphospholipid Antibody Syndrome

1994 ◽  
Vol 71 (04) ◽  
pp. 424-427 ◽  
Author(s):  
Masahide Yamazaki ◽  
Hidesaku Asakura ◽  
Hiroshi Jokaji ◽  
Masanori Saito ◽  
Chika Uotani ◽  
...  
Keyword(s):  
Plasma Levels ◽  
Active Form ◽  
Plasminogen Activator Inhibitor ◽  
Arterial System ◽  
Control Group ◽  
Antiphospholipid Antibody ◽  
Antiphospholipid Antibody Syndrome ◽  
Lipoprotein A ◽  
Soluble Thrombomodulin ◽  
Relationship Of

SummaryThe mechanisms underlying clinical abnormalities associated with the antiphospholipid antibody syndrome (APAS) have not been elucidated. We measured plasma levels of lipoprotein(a) [Lp(a)], the active form of plasminogen activator inhibitor (active PAI), thrombin-antithrombin III complex (TAT) and soluble thrombomodulin (TM), to investigate the relationship of these factors to thrombotic events in APAS. Mean plasma levels of Lp(a), TAT, active PAI and TM were all significantly higher in patients with aPL than in a control group of subjects. Plasma levels of Lp(a) and active PAI were significantly higher in patients with aPL and arterial thromboses than in patients with aPL but only venous thromboses. There was a significant correlation between plasma levels of Lp(a) and active PAI in patients with aPL. These findings suggest that patients with aPL are in hypercoagulable state. High levels of Lp(a) in plasma may impair the fibrinolytic system resulting in thromboses, especially in the arterial system.

Actor Relations in Interregional Cooperation Policy Dynamics Case Study: The Banjar Bakula Metropolitan Area Development Program in South Kalimantan Province

2018 ◽  
Vol 2 (2) ◽  
pp. 115
Author(s):  
Taufik Abrain
Keyword(s):  
Regional Cooperation ◽  
Development Program ◽  
Policy Dynamics ◽  
Interregional Cooperation ◽  
Object Of Study ◽  
Relationship Of ◽  
The Relationship ◽  
Area Development ◽  
Cooperation Policy

Several studies have shown that the success of interregional cooperation may be influenced by coordination, commitment, participation, variance of cooperation, structure, format of cooperation, and political will. Nevertheless, these factors do not stand alone since actor relations as a determining aspect is capable of driving those factors effectively. This article aims to examine the aspect of actor relations as a contributing factor that determines successful cooperation among regions. This is a qualitative research with the policy of inter-regional cooperation of the Banjarbakula Program, South Kalimantan Province from February 2017 to February 2018, set as its object of study. The result of this study states that the success of inter-regional cooperation is influenced by the relationship of actors in development factors as suggested by previous experts. The actors involved in the inter-regional cooperation examined in this case had become triggers of coordination, commitment, and participation toward success and failure, as well as the effectiveness of regional cooperation policy. Structural obstacles, ego-centric character, minimum budget availability, and non-visionary planning could be overcome as long as actor relations were properly managed.

scholarly journals Greater Power but Not Strength Gains Using Flywheel Versus Equivolumed Traditional Strength Training in Junior Basketball Players

2021 ◽  
Vol 18 (3) ◽  
pp. 1181
Author(s):  
Marko D. M. Stojanović ◽  
Mladen Mikić ◽  
Patrik Drid ◽  
Julio Calleja-González ◽  
Nebojša Maksimović ◽  
...  
Keyword(s):  
Strength Training ◽  
Training Group ◽  
T Test ◽  
Control Group ◽  
Basketball Players ◽  
Significant Group ◽  
Sprint Time ◽  
Change Of Direction ◽  
Time Interaction ◽  
And Control

The main aim of the present study was to compare the effects of flywheel strength training and traditional strength training on fitness attributes. Thirty-six well trained junior basketball players (n = 36; 17.58 ± 0.50 years) were recruited and randomly allocated into: Flywheel group (FST; n = 12), traditional strength training group (TST; n = 12) and control group (CON; n = 12). All groups attended 5 basketball practices and one official match a week during the study period. Experimental groups additionally participated in the eight-week, 1–2 d/w equivolume intervention conducted using a flywheel device (inertia = 0.075 kg·m−2) for FST or free weights (80%1 RM) for TST. Pre-to post changes in lower limb isometric strength (ISOMET), 5 and 20 m sprint time (SPR5m and SPR20m), countermovement jump height (CMJ) and change of direction ability (t-test) were assessed with analyses of variance (3 × 2 ANOVA). Significant group-by-time interaction was found for ISOMET (F = 6.40; p = 0.000), CMJ (F = 7.45; p = 0.001), SPR5m (F = 7.45; p = 0.010) and T test (F = 10.46; p = 0.000). The results showed a significantly higher improvement in CMJ (p = 0.006; 11.7% vs. 6.8%), SPR5m (p = 0.001; 10.3% vs. 5.9%) and t-test (p = 0.045; 2.4% vs. 1.5%) for FST compared to the TST group. Simultaneously, th FST group had higher improvement in ISOMET (p = 0.014; 18.7% vs. 2.9%), CMJ (p = 0.000; 11.7% vs. 0.3%), SPR5m (p = 0.000; 10.3% vs. 3.4%) and t-test (p = 0.000; 2.4% vs. 0.6%) compared to the CON group. Players from the TST group showed better results in CMJ (p = 0.006; 6.8% vs. 0.3%) and t-test (p = 0.018; 1.5% vs. 0.6%) compared to players from the CON group. No significant group-by-time interaction was found for sprint 20 m (F = 2.52; p = 0.088). Eight weeks of flywheel training (1–2 sessions per week) performed at maximum concentric intensity induces superior improvements in CMJ, 5 m sprint time and change of direction ability than equivolumed traditional weight training in well trained junior basketball players. Accordingly, coaches and trainers could be advised to use flywheel training for developing power related performance attributes in young basketball players.

Research on the methods and means of action strength training in aerobics training

2021 ◽  
pp. 002072092110042
Author(s):  
Xiaona Yang ◽  
Yang Ji ◽  
Da Ke ◽  
Fang Li
Keyword(s):  
Strength Training ◽  
Team Member ◽  
High Efficiency ◽  
Colleges And Universities ◽  
The Body ◽  
Energy Output ◽  
Control Group ◽  
Experimental Sample ◽  
Training Method ◽  
Core Strength

Aerobics is a beautiful and rhythmic sport. In recent years, aerobics has developed rapidly, and has become one of the essential courses of physical education in Colleges and universities. But the existing aerobics courses in Colleges and universities are less involved in the training process of action strength. Lack of strength quality is a common shortcoming of Aerobics Athletes in Colleges and universities. Therefore, this paper puts forward the methods and means of action strength training in aerobics training. According to the characteristics of competitive aerobics, combined with the traditional training strategy of action strength, this paper formulates the method of action strength training suitable for College Aerobics athletes. In order to further verify the effectiveness of this method, this paper takes a university aerobics team as an experimental sample to carry out a comparative analysis of the effect of action strength training. Relevant studies have proved that core strength training has the following effects on aerobics players: 1. Helps the calisthenics team member stabilize the trunk, improve the body's control ability and balance ability. 2. It is conducive to completing difficult movements of calisthenics with high efficiency and low energy consumption. 3. Helps the aerobics team member to enhance the special strength. 4. It can effectively prevent sports injuries. 5. It can improve the direction change and displacement speed of the body. 6. It can improve the energy output of the core strength to the limbs and other muscle groups during movement, so that the movement can be completed more perfectly.According to the results of the experiment, the explosive force and endurance of the experimental group after 8 weeks of training have been significantly improved, and formed a more obvious difference with the control group. The aerobics training method developed in this paper can be divided into two stages: the initial stage and the middle stage, which can better meet the students with different physical qualities. At the end of this paper, a fast strength training method is introduced, and the characteristics of different training methods are analyzed.

scholarly journals Does regular strength training cause urinary incontinence in overweight inactive women? A randomized controlled trial

2021 ◽  
Author(s):  
Kari Bø ◽  
Lene Anette H. Haakstad ◽  
Gøran Paulsen ◽  
Anne Mette Rustaden
Keyword(s):  
Randomized Controlled Trial ◽  
Urinary Incontinence ◽  
Strength Training ◽  
Short Form ◽  
Controlled Trial ◽  
Secondary Outcome ◽  
Control Group ◽  
Randomized Controlled ◽  
Sum Score ◽  
New Onset

Abstract Introduction and hypothesis Urinary incontinence (UI) is common in women who exercise. We aimed to investigate new onset UI in formerly inactive, overweight or obese women (BMI > 25) participating in three different strength training modalities compared with a non-exercising control group. Methods This was a secondary analysis of an assessor blinded randomized controlled trial investigating the effect of 12 weeks of three strength training concepts for women on muscle strength and body composition. None of the programs included pelvic floor muscle training. International Consensus on Incontinence Questionnaire Urinary Incontinence Short Form (ICIQ-UI-SF) was used to investigate primary outcome; new onset UI, and secondary outcome; ICIQ-UI-SF sum score. Suissa and Shuster’s exact unconditional test was used to analyze difference in new onset UI. Difference in ICIQ-UI-SF sum score is presented as mean with 95% CI. Results At baseline 40 out of 128 (31.2%) participants reported UI. Three out of 27, 2 out of 17, 2 out of 23, and 0 out of 21 women in the three training and control groups respectively had new onset UI. There were no statistically significant differences in new onset UI across the groups or when collapsing new onset UI in the intervention groups compared with the controls (7 out of 67 vs 0 out of 21), p = 0.124. After the intervention the control group reported worse ICIQ-UI-SF sum score than any of the training groups; mean difference − 6.6 (95% CI: −11.9, −1.27), p = 0.012, but there was no difference in change from baseline to 12 weeks between the groups p = 0.145). Conclusions There was no statistically significant change in UI after strength training.

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