Hypohydration and hyperthermia impair neuromuscular control after exercise
Distefano LJ, Casa DJ, Vansumeren MM, Karslo RM, Huggins RA, Demartini JK, Stearns RL, Armstrong LE, Maresh CM
Medicine and science in sports and exercise · 27 citas
Etiquetas de revisión
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Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación no declarada
Publicación
- Publicado
- 2013-02-01 · Med Sci Sports Exerc · vol. 45 · número 6 · págs. 1166–1173
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 50 citas · más que el 91% de estudios similares · 2.9× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 29 trabajos
- Acceso
- De pago
- Áreas de investigación
- Thermoregulation and physiological responses · Exercise and Physiological Responses · Muscle metabolism and nutrition
- Palabras clave
- Medicine, Treadmill, Analysis of variance, Post-hoc analysis, Anesthesia, Physical therapy, Internal medicine
- MeSH
- humans, dehydration, fatigue, exercise test, exercise, hyperthermia, induced, psychomotor performance, air conditioning, humidity, adolescent, adult, male, postural balance, hot temperature, young adult, healthy volunteers
9 autores
- Lindsay J. DiStefano🇺🇸University of Connecticut
- Douglas J. Casa🇺🇸University of Connecticut
- MEGAN M. VANSUMEREN🇺🇸University of Connecticut
- RACHEL M. KARSLO🇺🇸University of Connecticut
- Robert A. Huggins🇺🇸University of Connecticut
- Julie K. DeMartini🇺🇸University of Connecticut
- Rebecca L. Stearns🇺🇸University of Connecticut
- Lawrence E. Armstrong🇺🇸University of Connecticut
- Carl M. Maresh🇺🇸University of Connecticut
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
This study aimed to evaluate the effects of hypohydration and hyperthermia during exercise on movement technique and postural control.
Methods
Twelve healthy men (age = 20 ± 2 yr, height = 182 ± 8 cm, mass = 74.0 ± 8.2 kg, V˙O2max = 57.0 ± 6.0 mL·kg·min; mean ± SD) completed four randomized test sessions: euhydrated temperate (EUT), euhydrated hot (EUH), hypohydrated temperate (HYT), and hypohydrated hot (HYH). Temperate and hot conditions were performed in 18.0°C ± 0.2°C, 50.0% ± 3.5% relative humidity, and 34.0°C ± 0.3°C, 45.0% ± 4.5% relative humidity, respectively. Movement technique and postural control were assessed before exercise (PRE), after exercise (POST), and after recovery (REC). Movement technique was evaluated using the Landing Error Scoring System (LESS). Postural control was assessed using the Balance Error Scoring System (BESS) and center-of-pressure sway velocity (SV) and elliptical sway area (ESA) during a dynamic balance test. The 90-min treadmill exercise protocol (1.34-1.78 m·s; 5% grade) required subjects to walk carrying a 20.5-kg rucksack. Subjects sat quietly in the test environment during a 60-min recovery period after exercise. Repeated-measures ANOVAs with a Tukey-HSD post hoc test evaluated differences between time and condition for dependent variables.
Results
Exercise during HYH significantly increased LESS scores (PRE = 3.72 ± 1.73, POST = 4.42 ± 1.75) compared with HYT (3.75 ± 1.76) and EUH (3.61 ± 1.71) (P < 0.05). LESS scores remained elevated during REC for HYH compared with EUT (4.39 ± 1.47 vs 3.47 ± 2.05, P < 0.05). The HYH condition caused the greatest number of BESS errors (P = 0.02), largest ESA (P < 0.05), and highest SV (P = 0.02). Regardless of the condition, participants had the most BESS errors (P = 0.002) and highest SV (P = 0.003) during POST compared with the PRE and REC.
Conclusions
Hypohydration during exercise in the heat impairs neuromuscular control. These findings suggest that physical activity in the heat while dehydrated may affect parameters associated with a higher risk of injury.
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