Influence of Rest Interval Duration on Muscular Power Production in the Lower-Body Power Profile

When an athlete wears a mouthguard, the position of the lower jaw is changed by virtue of the teeth being unable to occlude. Little research is available in in this area, which have indicated both positive impact and no positive impact.ObjectivesThis study aims to explore the influence of the lower jaw position on athletic performance in elite athletes.MethodsA repeated measures study compared two lower jaw positions, the athlete’s normal (habitual) bite and the lower jaw position when the muscles of mastication are at physiological rest (physiological rest bite). 15 athletes completed a medicine ball putt (upper body power), vertical jump (lower body power), sit and reach (composite hamstring flexibility), passive knee flexion (hamstring muscle length) and star excursion balance (stability and balance) tests in each condition.ResultsPaired t-tests showed the physiological rest bite had significant (p<0.05) positive effect on athletic performance for each test. On average the physiological rest bite provided an increase of lower body power (5.8%), upper body power (10%), hamstring flexibility (14%) and balance and stability (4.8%) compared to the habitual bite.ConclusionThis study provides evidence of the need for further research to confirm if the lower jaw position can be optimised for athletic performance in athletes.

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Influence of Playing Standard on Upper- and Lower-Body Strength, Power, and Velocity Characteristics of Elite Rugby League Players

Journal of Functional Morphology and Kinesiology ◽

10.3390/jfmk4020022 ◽

2019 ◽

Vol 4 (2) ◽

pp. 22 ◽

Cited By ~ 3

Author(s):

John F. T. Fernandes ◽

Matthew Daniels ◽

Liam Myler ◽

Craig Twist

Keyword(s):

Bench Press ◽

Peak Velocity ◽

First Grade ◽

Rugby League ◽

Power Relationships ◽

Lower Body ◽

Body Strength ◽

Lower Body Strength ◽

Lower Body Power ◽

Level Resistance

Background: To compare load–velocity and load–power relationships among first grade (n = 26, age 22.9 ± 4.3 years), academy (n = 23, age 17.1 ± 1.0 years), and scholarship (n = 16, age 15.4 ± 0.5 years) Super League rugby league players. Methods: Participants completed assessments of maximal upper- and lower-body strength (1RM) and peak velocity and power at 20, 40, 60, and 80 kg during bench press and squat exercises, in a randomised order. Results: Bench press and squat 1RM were highest for first grade players compared with other standards (effect size (ES) = −0.43 to −3.18). Peak velocities during bench and squat were greater in the higher playing standards (ES = −0.39 to −3.72 range), except for the squat at 20 and 40 kg. Peak power was higher in the better playing standards for all loads and exercises. For all three groups, velocity was correlated to optimal bench press power (r = 0.514 to 0.766), but only 1RM was related to optimal power (r = 0.635) in the scholarship players. Only squat 1RM in the academy was related to optimal squat power (r = 0.505). Conclusions: Peak velocity and power are key physical qualities to be developed that enable progression from junior elite rugby league to first grade level. Resistance training should emphasise both maximal strength and velocity components, in order to optimise upper- and lower-body power in professional rugby league players.

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Effects of Rest Interval Duration in Resistance Training on Measures of Muscular Strength: A Systematic Review

Sports Medicine ◽

10.1007/s40279-017-0788-x ◽

2017 ◽

Vol 48 (1) ◽

pp. 137-151 ◽

Cited By ~ 24

Author(s):

Jozo Grgic ◽

Brad J. Schoenfeld ◽

Mislav Skrepnik ◽

Timothy B. Davies ◽

Pavle Mikulic

Keyword(s):

Systematic Review ◽

Resistance Training ◽

Muscular Strength ◽

Interval Duration ◽

Rest Interval

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Active Dehydration Impairs Upper and Lower Body Anaerobic Muscular Power

The Journal of Strength and Conditioning Research ◽

10.1519/jsc.0b013e3181635ba5 ◽

2008 ◽

Vol 22 (2) ◽

pp. 455-463 ◽

Cited By ~ 28

Author(s):

Leon C Jones ◽

Michelle A Cleary ◽

Rebecca M Lopez ◽

Ron E Zuri ◽

Richard Lopez

Keyword(s):

Lower Body ◽

Muscular Power

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Effect of a Supervised Stretching Program on Neck, Shoulder, and Trunk Range of Motion in Older Women

Canadian Journal on Aging / La Revue canadienne du vieillissement ◽

10.1017/s0714980821000350 ◽

2021 ◽

pp. 1-7

Author(s):

Sandra C. Webber ◽

Michelle M. Porter

Keyword(s):

Range Of Motion ◽

Older Women ◽

Intervention Group ◽

Field Tests ◽

Community Dwelling ◽

Upper Body ◽

Lower Body ◽

Power Training ◽

And Control ◽

Lower Body Power

Abstract Upper body and neck range of motion (ROM) are important for safe walking and driving. The purpose of this study was to determine whether stretching would improve neck, trunk, and shoulder ROM. Forty-eight community-dwelling women (75 ± 3 years of age) were randomly allocated to intervention (upper body stretching, n = 15) and control conditions (lower body power training, n = 33). All participants exercised in supervised 45-minute sessions twice weekly for 12 weeks. Testing of upper body ROM included a cervical ROM, device-based measurement and field tests of the neck, trunk, and shoulder ranges. Shoulder ROM was the only movement that improved in the intervention group beyond levels seen in control participants (33% increase, p < 0.01). Neck and trunk ROM did not change in response to a specific stretching program. Older adults with ROM limitations may need to explore other exercise options or focus on compensatory strategies for safe community mobility.

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Hamstring Flexibility Can Predict Lower Body Anaerobic Power Production in Recreationally Trained College Males

Journal of Athletic Enhancement ◽

10.4172/2324-9080.1000308 ◽

2018 ◽

Vol 07 (05) ◽

Author(s):

Louise A Kelly ◽

Tyler Schnorf ◽

Allan Knox

Keyword(s):

Anaerobic Power ◽

Power Production ◽

Lower Body ◽

College Males ◽

Hamstring Flexibility

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Physical Qualities Pertaining to Shorter and Longer Change-of-Direction Speed Test Performance in Men and Women

Sports ◽

10.3390/sports7020045 ◽

2019 ◽

Vol 7 (2) ◽

pp. 45 ◽

Cited By ~ 3

Author(s):

Robert Lockie ◽

Brett Post ◽

J. Dawes

Keyword(s):

Test Performance ◽

Vertical Jump ◽

Anaerobic Power ◽

Regression Equations ◽

Lower Body ◽

Training Time ◽

Linear Speed ◽

Change Of Direction ◽

Explained Variance ◽

Lower Body Power

This study investigated relationships between shorter (505, change-of-direction (COD) deficit as a derived physical quality) and longer (Illinois agility test; IAT) COD tests with linear speed, lower-body power (multidirectional jumping), and strength in recreationally-trained individuals. Twenty-one males and 22 females (similar to collegiate club-sport and tactical athletes) were assessed in: 505 and COD deficit from each leg; IAT; 20 m sprint; vertical jump (VJ height, peak anaerobic power measured in watts (PAPw), power-to-body mass ratio); standing broad jump; lateral jump (LJ) from each leg; and absolute and relative isometric midthigh pull (IMTP) strength. Partial correlations calculated sex-determined relationships between the COD and performance tests, with regression equations calculated (p < 0.05). The 505 and IAT correlated with all tests except PAPw and absolute IMTP (r = ±0.43–0.71). COD deficit correlated with the LJ (r = −0.34–0.60). Left- and right-leg 505 was predicted by sex, 20 m sprint, and left-leg LJ (70–77% explained variance). Right-leg COD deficit was predicted by sex and left-leg LJ (27% explained variance). IAT was predicted by sex, 20 m sprint, right-leg LJ, and relative IMTP (84% explained variance). For individuals with limited training time, improving linear speed, and relative lower-body power and strength, could enhance shorter and longer COD performance.

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