CONTRIBUTIONS OF LOCAL MUSCLE FATIGUE AND CARDIOVASCULAR SYSTEM TO THE INCREASE OF PERCEIVED EXERTION DURING STEPPING

Ketogenic low-carbohydrate high-fat (LCHF) diets are increasingly popular in broad sections of the population. The main objective of this study was to evaluate the effects of a non-energy-restricted ketogenic LCHF diet on muscle fatigue in healthy, young, and normal-weight women. Twenty-four women were randomly allocated to a 4-week ketogenic LCHF diet followed by a 4-week control diet (a National Food Agency recommended diet), or the reverse sequence due to the crossover design. Treatment periods were separated by a 15 week washout period. Seventeen women completed the study and were included in the analyses. Treatment effects were evaluated using mixed models. The ketogenic LCHF diet had no effect on grip strength or time to fatigue, measured with handgrip test (day 24–26). However, cycling time to fatigue decreased with almost two minutes (−1.85 min 95% CI:[−2.30;−1.40]; p < 0.001) during incremental cycling (day 25–27), accommodated with higher ratings of perceived exertion using the Borg scale (p < 0.01). Participants’ own diary notes revealed experiences of muscle fatigue during daily life activities, as well as during exercise. We conclude that in young and healthy women, a ketogenic LCHF diet has an unfavorable effect on muscle fatigue and might affect perceived exertion during daily life activities.

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Recovery of Joint Position Sense in the Shoulder after Muscle Fatigue

Journal of Sport Rehabilitation ◽

10.1123/jsr.15.4.312 ◽

2006 ◽

Vol 15 (4) ◽

pp. 312-325 ◽

Cited By ~ 8

Author(s):

Hsiao-Yun Chang ◽

Chen-Sheng Chen ◽

Shun-Hwa Wei ◽

Chi-Huang Huang

Keyword(s):

Muscle Fatigue ◽

Repeated Measures ◽

Position Sense ◽

Joint Position Sense ◽

Joint Position ◽

Strength Assessment ◽

Outcome Measurements ◽

Before And After ◽

Shoulder Strength ◽

Local Muscle Fatigue

Context:Fatigue of the shoulder rotator muscles may negatively affect joint position sense (JPS) and ultimately lead to injury.Objective:Recovery of shoulder JPS after muscle fatigue.Design:A repeated-measures study.Setting:Musculoskeletal research laboratory.Patients:Thirteen subjects participated in joint position error tests and isokinetic concentric strength assessment in shoulder rotation, before and after rotator muscle fatigue.Interventions:Local muscle fatigue was induced using isokinetic concentric contractions of the shoulder rotator muscles.Main Outcome Measurements:Shoulder rotator strength and JPS error signals were measured before fatigue, immediately after fatigue, and every ten minutes thereafter for one hour.Results:Before shoulder rotation muscle fatigue, the accuracy of shoulder JPS was 2.79 ± 1.67 degrees. After muscle fatigue, the accuracy decreased to 6.39 ± 2.90 degrees. Shoulder JPS was influenced up to 40 minutes after muscle fatigue, but shoulder strength was only affected for 10 minutes after muscle fatigue.Conclusions:Proprioceptive recovery was slower than strength following fatigue of the shoulder rotators.

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Assessment of local muscle fatigue by NIRS

2013 Seventh International Conference on Sensing Technology (ICST) ◽

10.1109/icsenst.2013.6727728 ◽

2013 ◽

Cited By ~ 2

Author(s):

Yoshiki Muramatsu ◽

Hiroshi Kobayashi

Keyword(s):

Muscle Fatigue ◽

Local Muscle Fatigue

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Recovery Effects of Repeated Exposures to Normobaric Hyperoxia on Local Muscle Fatigue

The Journal of Strength and Conditioning Research ◽

10.1519/jsc.0000000000000386 ◽

2014 ◽

Vol 28 (8) ◽

pp. 2173-2179 ◽

Cited By ~ 3

Author(s):

Yuka Yokoi ◽

Ryuya Yanagihashi ◽

Katsuyuki Morishita ◽

Noboru Goto ◽

Takayuki Fujiwara ◽

...

Keyword(s):

Muscle Fatigue ◽

Normobaric Hyperoxia ◽

Local Muscle Fatigue

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Cardiorespiratory, Metabolic and Muscular Responses during a Video-Recorded Aerobic Dance Session on an Air Dissipation Platform

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17249511 ◽

2020 ◽

Vol 17 (24) ◽

pp. 9511

Author(s):

Alessandra Moreira-Reis ◽

José Luis Maté-Muñoz ◽

Juan Hernández-Lougedo ◽

Pablo García-Fernández ◽

Eulogio Pleguezuelos-Cobo ◽

...

Keyword(s):

Muscle Fatigue ◽

Perceived Exertion ◽

Pulmonary Ventilation ◽

Muscular Fatigue ◽

Metabolic Responses ◽

Hard Surface ◽

Aerobic Dance ◽

Jump Test ◽

Before And After ◽

Lactate Levels

Background: Aerobic dance (AD) is an appropriate physical activity for improving cardiorespiratory fitness. This study aimed to compare cardiorespiratory and metabolic responses, and muscle fatigue between an air dissipation platform (ADP) and a hard surface during a video-recorded AD session. Methods: 25 healthy young women (23.3 ± 2.5 years) completed three sessions. In session 1, participants performed an incremental test to exhaustion on a treadmill. One week after session 1, participants were randomly assigned in a crossover design to perform video-recorded AD sessions on an ADP and on a hard surface (sessions 2 and 3). Cardiorespiratory and metabolic responses were assessed during AD sessions. Muscular fatigue was measured before and after AD sessions by a countermovement jump test. Results: Significantly higher heart rate, respiratory exchange ratio, pulmonary ventilation, ventilatory oxygen equivalent, and ventilatory carbon dioxide equivalent were observed on an ADP than on a hard surface (p < 0.05). Despite a significant increase in lactate levels on an ADP (p ≤ 0.01), muscular fatigue and perceived exertion rating were similar on both surfaces (p > 0.05). Conclusions: Video-recorded AD on an ADP increased the cardioventilatory and metabolic responses compared to a hard surface, preventing further muscle fatigue.

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