The Effect of Maximal- and Explosive-Strength Training on Performance Indicators in Cyclists

2017 ◽  
Vol 12 (4) ◽  
pp. 470-480 ◽  
Author(s):  
Kris Beattie ◽  
Brian P. Carson ◽  
Mark Lyons ◽  
Ian C. Kenny
Keyword(s):  
Body Composition ◽  
Strength Training ◽  
Endurance Training ◽  
Body Mass ◽  
Performance Indicators ◽  
Intervention Group ◽  
Control Group ◽  
Maximal Strength ◽  
Explosive Strength ◽  
Road Cyclists

Cycling economy (CE), power output at maximal oxygen uptake (WV̇O2max), and anaerobic function (ie, sprinting ability) are considered the best physiological performance indicators in elite road cyclists. In addition to cardiovascular function, these physiological indicators are partly dictated by neuromuscular factors. One technique to improve neuromuscular function in athletes is through strength training. The aim of this study was to investigate the effect of a 20-wk maximal- and explosive-strength-training intervention on strength (maximal strength, explosive strength, and bike-specific explosive strength), WV̇O2max, CE, and body composition (body mass, fat and lean mass) in cyclists. Fifteen competitive road cyclists were divided into an intervention group (endurance training and strength training: n = 6; age, 38.0 ± 10.2 y; weight, 69.1 ± 3.6 kg; height, 1.77 ± 0.04 m) and a control group (endurance training only: n = 9; age, 34.8 ± 8.5 y; weight, 72.5 ± 7.2 kg; height, 1.78 ± 0.05 m). The intervention group strength-trained for 20 wk. Each participant completed 3 assessments: physiology (CE, WV̇O2max, power at 2 and 4 mmol/L blood lactate), strength (isometric midthigh pull, squat-jump height, and 6-s bike-sprint peak power), and body composition (body mass, fat mass, overall leanness, and leg leanness). The results showed significant between- and within-group changes in the intervention group for maximal strength, bike-specific explosive strength, absolute WV̇O2max, body mass, overall leanness, and leg leanness at wk 20 (P < .05). The control group showed no significant within-group changes in measures of strength, physiology, or body composition. This study demonstrates that 20 wk of strength training can significantly improve maximal strength, bike-specific explosive strength, and absolute WV̇O2max in competitive road cyclists.

scholarly journals A School-Based Exercise Intervention Program Increases Muscle Strength in Prepubertal Boys

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Susanna Stenevi-Lundgren ◽  
Robin M. Daly ◽  
Magnus K. Karlsson
Keyword(s):  
Body Composition ◽  
Physical Education ◽  
Muscle Strength ◽  
Body Mass ◽  
Intervention Program ◽  
Intervention Group ◽  
Knee Extensors ◽  
Control Group ◽  
School Based ◽  
Pubertal Boys

This prospective controlled intervention study over 12 months evaluated the effect of exercise on muscular function, physical ability, and body composition in pre-pubertal boys. Sixty-eight boys aged 6–8 years, involved in a general school-based exercise program of 40 min per school day (200 min/week), were compared with 46 age-matched boys who participated in the general Swedish physical education curriculum of mean 60 min/week. Baseline and annual changes of body composition were measured by dual energy X-ray absorptiometry (DXA), stature, and body mass by standard equipments, isokinetic peak torque (PT) of the knee extensors, and flexors at 60 and 180 deg/sec by computerized dynamometer (Biodex) and vertical jump height (VJH) by a computerized electronic mat. The annual gain in stature and body mass was similar between the groups whereas the increase in total body and regional lean mass (P<.001) and fat mass (P<.001) was greater in the exercise group. The one-year gain in body mass-adjusted knee extensor and flexor PT at 180 deg/sec was significantly greater in the intervention group compared with the control group (P<.01, adjusted for age at baseline andP<.001, adjusted for age and muscle strength at baseline, resp.). There was no group difference in VJH. In conclusion, the increase in school-based physical education from 60 to 200 minutes per week enhances the development of lean body mass and muscle strength in pre-pubertal boys.

scholarly journals Alterations in energy balance from an exercise intervention with ad libitum food intake

2016 ◽  
Vol 5 ◽  
Author(s):  
Katarina Melzer ◽  
Anne Renaud ◽  
Stefanie Zurbuchen ◽  
Céline Tschopp ◽  
Jan Lehmann ◽  
...  
Keyword(s):  
Body Composition ◽  
Energy Balance ◽  
Energy Expenditure ◽  
Body Mass ◽  
Cardiorespiratory Fitness ◽  
Exercise Intervention ◽  
Intervention Group ◽  
Control Group ◽  
Anthropometric Measures ◽  
Ad Libitum

AbstractBetter understanding is needed regarding the effects of exercise alone, without any imposed dietary regimens, as a single tool for body-weight regulation. Thus, we evaluated the effects of an 8-week increase in activity energy expenditure (AEE) on ad libitum energy intake (EI), body mass and composition in healthy participants with baseline physical activity levels (PAL) in line with international recommendations. Forty-six male adults (BMI = 19·7–29·3 kg/m2) participated in an intervention group, and ten (BMI = 21·0–28·4 kg/m2) in a control group. Anthropometric measures, cardiorespiratory fitness, EI, AEE and exercise intensity were recorded at baseline and during the 1st, 5th and 8th intervention weeks, and movement was recorded throughout. Body composition was measured at the beginning and at the end of the study, and resting energy expenditure was measured after the study. The intervention group increased PAL from 1·74 (se 0·03) to 1·93 (se 0·03) (P < 0·0001) and cardiorespiratory fitness from 41·4 (se 0·9) to 45·7 (se 1·1) ml O2/kg per min (P = 0·001) while decreasing body mass (−1·36 (se 0·2) kg; P = 0·001) through adipose tissue mass loss (ATM) (−1·61 (se 0·2) kg; P = 0·0001) compared with baseline. The control group did not show any significant changes in activity, body mass or ATM. EI was unchanged in both groups. The results indicate that in normal-weight and overweight men, increasing PAL from 1·7 to 1·9 while keeping EI ad libitum over an 8-week period produces a prolonged negative energy balance. Replication using a longer period (and/or more intense increase in PAL) is needed to investigate if and at what body composition the increase in AEE is met by an equivalent increase in EI.

Strength Training Improves Exercise Economy in Triathletes During a Simulated Triathlon

2020 ◽  
pp. 1-11
Author(s):  
Kate M. Luckin-Baldwin ◽  
Claire E. Badenhorst ◽  
Ashley J. Cripps ◽  
Grant J. Landers ◽  
Robert J. Merrells ◽  
...  
Keyword(s):  
Strength Training ◽  
Endurance Training ◽  
Body Mass ◽  
Running Economy ◽  
Maximal Strength ◽  
Long Distance ◽  
Anthropometric Measures ◽  
Repetition Maximum ◽  
Exercise Economy ◽  
And Performance

Purpose: The completion of concurrent strength and endurance training can improve exercise economy in cyclists and runners; however, the efficacy of strength training (ST) implementation to improve economy in long-distance (LD) triathletes has not yet been investigated. The purpose of this study was to investigate physiological outcomes in LD triathletes when ST was completed concurrently to endurance training. Methods: A total of 25 LD triathletes were randomly assigned to either 26 weeks of concurrent endurance and ST (n = 14) or endurance training only (n = 11). The ST program progressed from moderate (8–12 repetitions, ≤75% of 1-repetition maximum, weeks 0–12) to heavy loads (1–6 repetitions, ≥85% of 1-repetition maximum, weeks 14–26). Physiological and performance indicators (cycling and running economy, swim time, blood lactate, and heart rate) were measured during a simulated triathlon (1500-m swim, 60-min cycle, and 20-min run) at weeks 0, 14, and 26. Maximal strength and anthropometric measures (skinfolds and body mass) were also collected at these points. Results: The endurance strength group significantly improved maximal strength measures at weeks 14 and 26 (P < .05), cycling economy from weeks 0 to 14 (P < .05), and running economy from weeks 14 to 26 (P < .05) with no change in body mass (P > .05). The endurance-only group did not significantly improve any economy measures. Conclusions: The addition of progressive load ST to LD triathletes’ training programs can significantly improve running and cycling economy without an increase in body mass.

Concurrent strength and sprint training increases resting metabolic rate in masters road cyclists

2020 ◽  
pp. 39-50
Author(s):  
Luke Delvecchio ◽  
Peter Reaburn ◽  
Jarrod Meerkin ◽  
Marko T. Korhonen ◽  
Nattai Borges ◽  
...  
Keyword(s):  
Metabolic Rate ◽  
Strength Training ◽  
Endurance Training ◽  
Training Stimulus ◽  
Resting Metabolic Rate ◽  
Endurance Athletes ◽  
Control Group ◽  
Sprint Training ◽  
Post Intervention ◽  
Road Cyclists

High-intensity concurrent sprint and strength training has been shown to provide a strong physiological training stimulus in young adult endurance athletes. However, the effect in veteran endurance athletes remains unknown. This study examined if replacing a portion of endurance training with concurrent sprint and strength training influenced resting metabolic rate (RMR) and lean mass (LM) in veteran endurance cyclists. Eighteen well-trained male veteran road cyclists (55.2 ± 8.4 years; 7.9 ± 1.1 training hrs/wk; 323 ± 53 Wpeak) were allocated to a concurrent strength and sprint training group (CT, n = 9) or control group (CON, n = 9). The CT group completed a 12-weeks of sprint and strength training while the CON group maintained their normal endurance training. RMR and LM were measured before and after the 12-week training intervention. CT training significantly (p < 0.05) increased both RMR (+14.2%, 1600 ± 244 to 1828 ± 207 kcal/day) and LM (+2.0%, 61.8 ± 5.5 to 63.1 ± 5.4 kg) pre to post-intervention. No significant changes from pre- to post-training were observed in the CON group. These findings suggest replacing a portion of endurance training with sprint and strength training may preserve, and even increase, LM and RMR in veteran road cyclists.

scholarly journals Effects and Responsiveness of a Multicomponent Intervention on Body Composition, Physical Fitness and Leptin in Overweight/Obese Adolescents

2021 ◽  
Vol 18 (14) ◽  
pp. 7267
Author(s):  
Leticia Borfe ◽  
Caroline Brand ◽  
Letícia Schneiders ◽  
Jorge Mota ◽  
Claudia Cavaglieri ◽  
...  
Keyword(s):  
Body Composition ◽  
Physical Fitness ◽  
Intervention Group ◽  
Interleukin 10 ◽  
Control Group ◽  
Post Intervention ◽  
Necrosis Factor Alpha ◽  
Obese Adolescents ◽  
Quasi Experimental ◽  
Multicomponent Program

Physical exercise reduces the biochemical markers of obesity, but the effects of multicomponent interventions on these markers should be explored. The present study aimed to elucidate how overweight/obese adolescents respond to a multicomponent program approach on body composition, physical fitness, and inflammatory markers, using a quasi-experimental study with 33 overweight/obesity adolescents (control group (CG) = 16; intervention group (IG) = 17). The intervention consisted of 24 weeks with physical exercises and nutritional and psychological guidance. Both groups were evaluated at the pre/post-intervention moments on body mass index (BMI); body fat (%Fat); waist circumference (WC); waist/hip ratio (WHR); waist-to-height ratio (WHtR), cardiorespiratory fitness (CRF); abdominal strength, flexibility; leptin; interleukin 6; interleukin 10; and tumor necrosis factor-alpha. Mixed-analysis of variance and generalized estimation equations were used for statistical analysis. There was an interaction effect between groups and time on %Fat (p = 0.002), WC (p = 0.023), WHR (p < 0.001), WHtR (p = 0.035), CRF (p = 0.050), and leptin (p = 0.026). Adolescents were classified as 82.4% responders for %Fat, 70.6% for WC, 88.2% for WHR, and 70.6% for CRF. Further, there was an association between changes in %Fat (p = 0.033), WC (p = 0.032), and WHR (p = 0.033) between responders and non-responders with CRF in the IG. There was a positive effect on body composition, physical fitness, and leptin. In addition, reductions in body composition parameters were explained by CRF improvements.

scholarly journals Sex differences in leptin and cardiometabolic profile after exercise intervention in physically inactive adults with primary hypertension and obesity

2021 ◽  
Vol 28 (Supplement_1) ◽  
Author(s):  
SMM Maldonado-Martin ◽  
PC Corres ◽  
AMAB Martinezaguirre-Betolaza ◽  
BJI Jurio-Iriarte ◽  
MTE Tous-Espelosin ◽  
...  
Keyword(s):  
Body Composition ◽  
Sex Differences ◽  
Aerobic Exercise ◽  
Body Mass ◽  
Primary Hypertension ◽  
Public Institution ◽  
Hypocaloric Diet ◽  
Moderate Intensity ◽  
Control Group ◽  
Physically Inactive

Abstract Funding Acknowledgements Type of funding sources: Public Institution(s). Main funding source(s): University of the Basque Country OnBehalf GIKAFIT PURPOSES. To analyse the change on leptin, body composition, blood pressure (BP), cardiorespiratory fitness (CRF) and some biochemical parameters in physically inactive women and men with primary hypertension (HTN) and obesity, and to evaluate the potential sex differences in the change after intervention. METHODS. Participants (n = 37 women, n= 40 men, 52.9 ± 6.9 yrs) from the EXERDIET-HTA study were randomized into attention control group (physical activity recommendations) or one of three supervised aerobic exercise groups [two days/week: high-volume (HV) with 45 min of moderate-intensity continuous training, HV and high-intensity interval training (HV-HIIT), and low volume-HIIT (LV-HIIT, 20 min)]. All participants received the same hypocaloric diet. All variables were assessed pre and post intervention (16 weeks). 24 h ambulatory BP monitoring was used to analyze systolic and diastolic BP. A cardiopulmonary exercise test was performed to determine peak oxygen uptake (VO2peak). RESULTS. Following the intervention, there were increments (P &lt; 0.01) in CRF by VO2peak (Women, W = 21.1 ± 3.7 vs. 24.6 ± 4.4 mL·kg-1·min-1, Men, M = 26.3 ± 6.0 vs. 33.1 ± 10.2 mL·kg-1·min-1) and decreases (P &lt; 0.05) in leptin (W = 49.5 ± 23.0 vs. 41.8 ± 19.9 ng/mL, M = 20.5 ± 14.8 vs. 12.9 ± 18.6 ng/mL), body mass (W = 84.7 ± 12.1 vs. 80.3 ± 11.5 kg, M = 97.9 ± 14.4 vs. 91.5 ± 13.3 kg), waist perimeter (W = 97.3 ± 10.7 vs. 94.3 ± 10.9 cm, M = 107.9 ± 8.7 vs. 101.5 ± 7.9 cm), fat mass (W = 42.3 ± 5.1 vs. 38.6 ± 8.4 %, M = 31.2 ± 5.0 vs. 28.0 ± 4.4 %), systolic BP (M = 136.5 ± 12.1 vs. 129.3 ± 12.5 mmHg), diastolic BP (W = 76.2 ± 8.9 vs. 74.1 ± 8.7 mmHg, M = 79.3 ± 7.2 vs. 75.0 ± 8.2 mmHg), total cholesterol (M = 216.1 ± 44.5 vs. 196.1 ± 35.0 mg/dL), insulin (W = 13.4 ± 7.9 vs. 9.4 ± 4.2 mU/L) values. There were significant between-sex differences in body mass (W=-5.2%, M=-6.5%, effect size, ES = 0.073), waist circumference (W=-3.1%, M=-5.9%, ES = 0.114), and VO2peak (W = 14.2%, M = 20.5%, ES = 0.059). CONCLUSIONS. Aerobic exercise along with hypocaloric diet is an effective non-pharmacological tool to induce beneficial changes in women and men in BP and leptin as a mediator of obesity-induced HTN, and other regulatory mechanisms such as body composition, CRF and biochemical profile. The found sex-related differences could confirm the need of individual non-pharmacological strategies.

scholarly journals Arm exercise training in chronic obstructive pulmonary disease

2012 ◽  
Vol 9 (3) ◽  
pp. 153-162 ◽  
Author(s):  
Zoe J McKeough ◽  
Peter TP Bye ◽  
Jennifer A Alison
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Strength Training ◽  
Endurance Training ◽  
Exercise Capacity ◽  
Exercise Test ◽  
Control Group ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Arm Exercise ◽  
Arm Strength

The aim of this study was to compare the effects of arm endurance training, arm strength training, a combination of arm endurance and strength training, and no arm training on endurance arm exercise capacity. A randomised controlled trial was undertaken with chronic obstructive pulmonary disease subjects randomised into one of four groups to complete 8 weeks of training: (a) arm endurance training (endurance group) consisting of supported and unsupported arm exercises, (b) arm strength training (strength group) using weight machines, (c) a combination of arm endurance and arm strength training (combined group), or (d) no arm training (control group). The primary outcome measurement was endurance arm exercise capacity measured by an endurance arm crank test. Secondary outcomes included functional arm exercise capacity measured by the incremental unsupported arm exercise test and health-related quality of life. A total of 52 subjects were recruited and 38 (73%) completed the study. When comparing the arm endurance group to the control group, there was a significant increase in endurance time of 6 min (95% CI 2–10, p < 0.01) following the interventions. When comparing the combined group to each of the control, endurance and strength groups, there was a significantly greater reduction in dyspnoea and rate of perceived exertion at the end of the functional arm exercise test for the combined group following the interventions. The mode of training to be favoured to increase endurance arm exercise capacity is arm endurance training. However, combined arm endurance and strength training may also be very useful to reduce the symptoms during everyday arm tasks.

scholarly journals Effect of weight and body composition changes on waist measurement of severely obese women receiving carbohydrate-restricted diet

2014 ◽  
Vol 27 (1) ◽  
pp. 05-13 ◽  
Author(s):  
Andresa Toledo Triffoni-Melo ◽  
Rita de Cássia Lusia dos Santos ◽  
Rosa Wanda Diez-Garcia
Keyword(s):  
Body Composition ◽  
Waist Circumference ◽  
Intervention Group ◽  
Control Group ◽  
Obese Women ◽  
Low Carbohydrate Diet ◽  
Low Carbohydrate ◽  
Conventional Diet ◽  
Severely Obese ◽  
Composition Changes

OBJECTIVE: To evaluate the effect of weight and body composition changes on waist measurement of severely obese women receiving a low-carbohydrate diet for a short-term. METHODS: Nineteen severely obese women divided into an intervention and a control group received a low-carbohydrate diet and a conventional diet, respectively, both with 1,200kcal, for seven days. Anthropometric measurements such as weight, body mass index, arm circumference, waist circumference (at the navel), two proposed measurements of waist circumference (waist circumference 1, 10cm above the navel; and waist circumference 2, 20cm above the navel), hip circumference; and body composition (lean mass and fat mass) were performed at baseline and end of the study. RESULTS: There was significant reduction of all variables in the intervention group (p<0.01), but the control group had no change in waist circumference (p=0.06) and hip circumference (p=0.36). Patients of the intervention group presented greater weight loss (4.4kg, p<0.01) and reduction of body mass index, waist circumference, waist circumference 1, waist circumference 2 (p<0.01), and fat mass (p=0.04) than the control group. CONCLUSION: The weight loss and body composition changes were greater in the low-carbohydrate group than in the conventional-diet group, and they had a greater impact on waist measurements. The proposed measurements (waist circumference 1 and waist circumference 2) were sensitive to weight reduction in both groups.

scholarly journals Bone Metabolism Markers and their Correlation with Body Mass Index in Aerobic Physical Activity

2018 ◽  
Vol 49 (2) ◽  
Author(s):  
Zorislava Bajić ◽  
Nela Rašeta ◽  
Nenad Ponorac
Keyword(s):  
Physical Activity ◽  
Body Mass Index ◽  
Bone Formation ◽  
Body Mass ◽  
Young Women ◽  
Intervention Group ◽  
Positive Influence ◽  
Control Group ◽  
Bone Resorption Marker

Introduction: Bone formation marker osteocalcin (OC) and bone resorption marker C-terminal telopeptide of type 1 collagen (CTX) can be used to detect or to monitor the early responses of the skeleton to physical activity. Literature suggests that it is likely that higher body mass index (BMI) has positive effect on bones and can postpone onset of osteoporosis.Aim of the Study: The aim of this study is to:1.Determine the effect of aerobic physical acitivity on OC and CTX in young women2.Investigate correlation of OC, CTX and BMI in young women engaged into structured aerobic excerciseMaterial and methods: Study included 64 healthy young women, aged 19 to 25 years, devided into two groups: intervention group (n=32) and control group (n=32). The study duration was six weeks with follow-up period of four weeks. The intervention group underwent structured aerobic physical activity program for six weeks, but the control group did not receive such program. Level of OC, CTX and BMI were measured at baseline, after 6-week aerobic program, and after 4-week follow up (only intervention group).Results: There was significant increase of OC level after 6-week aerobic program, while level of CTX did not changed. OC level was at its maximum immediately after finishing the program in the participants with normal BMI (p<0.001). There was no statistically significant interaction of BMI and CTX level.Conclusion: Aerobic physical activity increases level of osteocalcin, suggesting that it has positive influence on bone formation in young women, primarily in women with normal BMI.

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