Journal article 1475 views 545 downloads
The effect of lower limb occlusion on recovery following sprint exercise in academy rugby players
Natalie Brown,
N. Williams,
M. Russell,
C.J. Cook,
L.P. Kilduff,
Liam Kilduff 
Journal of Science and Medicine in Sport
Swansea University Authors:
Natalie Brown, Liam Kilduff
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DOI (Published version): 10.1016/j.jsams.2018.02.012
Abstract
ObjectivesThe effects of vascular occlusion on recovery of physiological and neuromuscular markers over 24 h, and hormonal reactivity to subsequent exercise were investigated.DesignCounterbalanced, randomised, crossoverMethodsAcademy rugby players (n = 24) completed six 50-m sprints (five-min inter-...
| Published in: | Journal of Science and Medicine in Sport |
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| ISSN: | 14402440 |
| Published: |
2018
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa38856 |
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| Abstract: |
ObjectivesThe effects of vascular occlusion on recovery of physiological and neuromuscular markers over 24 h, and hormonal reactivity to subsequent exercise were investigated.DesignCounterbalanced, randomised, crossoverMethodsAcademy rugby players (n = 24) completed six 50-m sprints (five-min inter-set recovery) before occlusion cuff application (thighs) and intermittent inflation to 171–266 mmHg (Recovery) or 15 mmHg (Con) for 12-min (two sets, three-min repetitions, three-min non-occluded reperfusion). Countermovement jumps, blood (lactate, creatine kinase), saliva (testosterone, cortisol), and perceptual (soreness, recovery) responses were measured before (baseline) and after (post, +2 h, +24 h) sprinting. Saliva was sampled after a 30-min resistance exercise session performed 24 h after sprinting.ResultsAlthough sprinting (total: 40.0 ± 2.8 s, p = 0.238; average: 6.7 ± 0.5 s, p = 0.674) influenced creatine kinase (p < 0.001, +457.1 ± 327.3 μ·L−1, at 24 h), lactate (p < 0.001, 6.8 ± 2.3 mmol·L−1, post), testosterone (p < 0.001, −55.9 ± 63.2 pg·ml−1, at 2 h) and cortisol (p < 0.001, −0.3 ± 0.3 μg·dl−1, at 2 h) concentrations, countermovement jump power output (p<0.001, −409.6 ± 310.1 W; −5.4 ± 3.4 cm, post), perceived recovery (p<0.001, −3.0 ± 2.3, post), and muscle soreness (p<0.001; 1.5 ± 1.1, at 24 h), vascular occlusion had no effect (all p>0.05) on recovery. In response to subsequent exercise performed 24 h after vascular occlusion, testosterone increased pre-to-post-exercise (Recovery: p = 0.031, 21.6 ± 44.9 pg·ml−1; Con: p = 0.178, 10.6 ± 36.6 pg·ml−1) however Δtestosterone was not significantly different (p = 0.109) between conditions.ConclusionsVascular occlusion had no effect on physiological or neuromuscular markers 2 h or 24 h after sprinting or in response to a physical stress test. |
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| Keywords: |
Occlusion; sprint; hormonal reactivity |
| College: |
Faculty of Science and Engineering |