Significant and serious dehydration does not affect skeletal muscle cramp threshold frequency
Braulick KW, Miller KC, Albrecht JM, Tucker JM, Deal JE
British journal of sports medicine · 30 citas
Cómo se estudió
- Diseño
- Ensayo clínico controlado (clasificado por nuestro filtro de IA)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación independiente
- Universidad u hospital
- North Dakota State University
Según 1 financiador declarado.
Publicación
- Publicado
- 2012-12-06 · Br J Sports Med · vol. 47 · número 11 · págs. 710–714
- Editorial
- BMJ
- Citado
- 45 citas · más que el 83% de estudios similares · 1.6× el promedio de su campo
- Referencias
- 41 trabajos
- Acceso
- De pago
- Áreas de investigación
- Thermoregulation and physiological responses · Body Composition Measurement Techniques · Sports Performance and Training
- Palabras clave
- Medicine, Intensity (physics), Muscle cramp, Dehydration, Electromyography, Cycle ergometer, Internal medicine, Physical therapy, Cardiology, Physical medicine and rehabilitation, Chemistry, Blood pressure, Heart rate
- MeSH
- muscle, skeletal, sweat, humans, muscle cramp, dehydration, electromyography, exercise, analysis of variance, muscle fatigue, adolescent, adult, male, young adult, biomarkers
5 autores
- Kyle William Braulick🇺🇸North Dakota State University
- Kevin Charles Miller🇺🇸 · autor de correspondenciaNorth Dakota State University
- Jay M. Albrecht🇺🇸Minnesota State University Moorhead
- Jared M. Tucker🇺🇸Boston Children's Hospital; Helen DeVos Children's Hospital
- James E. Deal🇺🇸North Dakota State University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Objective
Many clinicians believe that exercise-associated muscle cramps (EAMC) occur because of dehydration. Experimental research supporting this theory is lacking. Mild hypohydration (3% body mass loss) does not alter threshold frequency (TF), a measure of cramp susceptibility, when fatigue and exercise intensity are controlled. No experimental research has examined TF following significant (3-5% body mass loss) or serious hypohydration (>5% body mass loss). Determine if significant or serious hypohydration, with moderate electrolyte losses, decreases TF.
Design
A prepost experimental design was used. Dominant limb flexor hallucis brevis cramp TF, cramp electromyography (EMG) amplitude and cramp intensity were measured in 10 euhydrated, unacclimated men (age=24±4 years, height=184.2±4.8 cm, mass=84.8±11.4 kg). Subjects alternated exercising with their non-dominant limb or upper body on a cycle ergometer every 15 min at a moderate intensity until 5% body mass loss or volitional exhaustion (3.8±0.8 h; 39.1±1.5°C; humidity 18.4±3%). Cramp variables were reassessed posthypohydration.
Results
Subjects were well hydrated at the study's onset (urine specific gravity=1.005±0.002). They lost 4.7±0.5% of their body mass (3.9±0.5 litres of fluid), 4.0±1.5 g of Na(+) and 0.6±0.1 g K(+) via exercise-induced sweating. Significant (n=5) or serious hypohydration (n=5) did not alter cramp TF (euhydrated=15±5 Hz, hypohydrated=13±6 Hz; F1,9=3.0, p=0.12), cramp intensity (euhydrated= 94.2±41%, hypohydrated=115.9±73%; F1,9=1.9, p=0.2) or cramp EMG amplitude (euhydrated=0.18±0.06 µV, hypohydrated= 0.18±0.09 µV; F1,9=0.1, p=0.79).
Conclusions
Significant and serious hypohydration with moderate electrolyte losses does not alter cramp susceptibility when fatigue and exercise intensity are controlled. Neuromuscular control may be more important in the onset of muscle cramps than dehydration or electrolyte losses.
Resumen vía Europe PMC. Los derechos de autor siguen siendo de los autores o la editorial.
Confianza de la comunidad
Cargando…
¿Cuánto confías en los hallazgos de este estudio?
Comentarios
¿Algo está mal aquí?
Señala este estudio si su información, etiquetas o financiación parecen incorrectas. Un editor revisa cada señalamiento.
Información educativa sobre investigación publicada. No es consejo médico ni una recomendación para empezar o dejar nada.