The influence of subcutaneous fat in the skin temperature variation rate during exercise

摘要

Methods This is a short-longitudinal study that involved 17 healthy male trained volunteers. Volunteers were divided in two groups. The first called GP1 with nine volunteers (biceps brachii skinfold thickness < 4 mm) and the second called GP2 with eight volunteers (biceps brachii skinfold thickness from 4 to 8 mm). Both groups performed three sets with 16 repetitions of unilateral biceps brachii bi-set exercise with dominant arm (eight repetitions of biceps curls and another eight of biceps hammer curls, with dumbbells), and with load of 70% of 1RM. The rest time between sets was 90s. Results The skin temperature variation rate (variation of temperature / time) was 3.59 ?? 10-3 ?± 1.47 ?? 10-3 ?°C/s for GP1 and 0.66 ?? 10-3 ?± 4.83 ?? 10-3 ?°C/s for GP2 (p = 0.138) considering all moments. For the period after set 1 until the end of set 3, skin temperature variation rate was 5.11 ?? 10-3 ?± 2.57 ?? 10-3 ?°C/s for GP1 and 1.88 ?? 10-3 ?± 3.60 ?? 10-3 ?°C/s for GP2 (p = 0.048). Subcutaneous fat layer also influences the skin temperature at resting (p = 0.044). Conclusion Subjects with lower subcutaneous fat layer have a higher skin temperature variation rate during exercise than those with higher subcutaneous fat layer.