Effect of low-intensity resistance training with heat stress on the HSP72, anabolic hormones, muscle size, and strength in elderly women

Abstract

We found that low-intensity training with heat stress stimulated the anabolic hormones of elderly women, improving their muscle strength and hypertrophy. We believe that low-intensity training with heat stress is an effective way to prevent muscle atrophy and to improve muscle strength in elderly women.

The Effect of Exercise on Glucoregulatory Hormones: A Countermeasure to Human Aging: Insights from a Comprehensive Review of the Literature

“…As a result of the ambiguity in the findings, the role of IGF-I in the adaptive process to exercise during middle and older age remains unclear. The majority of studies reported that resistance training can increase the concentration of IGF-1 in blood and increase muscle mass and function [82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97]. Yet, more longitudinal studies are needed to explore the influence of resistance training on IGF-1 in older adults, given the presence of discrepancies among the findings.…”

Resistance Exercise, Electrical Muscle Stimulation, and Whole-Body Vibration in Older Adults: Systematic Review and Meta-Analysis of Randomized Controlled Trials

“…Knee extension strength was by far the most common outcome across studies and was reported in 2 EMS studies with 2 intervention groups [ 36 , 37 ], 6 WBW studies with 8 intervention groups [ 25 , 26 , 38 , 39 , 40 , 41 , 42 ], and 26 RT studies with 29 intervention groups [ 25 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 ]. In total, 5 studies measured isokinetic strength (1 study at 30°/s, 3 studies at 60°/s and 1 study sat 90°/s), and the rest measured isometric strength.…”

“…Most of the studies showed very small negative or very small positive effects, while the pooled effect was heavily influenced by the aforementioned study. Furthermore, 3 WBV studies [ 42 , 87 , 88 ] (5 intervention groups) and 3 RT studies [ 47 , 62 , 66 ] reported the quadriceps muscle (or individual heads of quadriceps muscle) cross-sectional area. In order to obtain a sufficient number of studies for meaningful comparison, these results were compared together and expressed as SMD.…”

The effect of low-intensity resistance training after heat stress on muscle size and strength of triceps brachii: a randomized controlled trial

“…Goto et al investigated the combined effect of low-intensity resistance training with < 50% 1RM and heat stress in young males, and they could increase muscle mass and strength [15]. In the study by Yoon et al on elderly women, they reported similar increases in muscle mass and strength with a combination of low-intensity resistance training (40% 1RM) and heat stress as obtained with moderate-intensity resistance training (60% 1RM) alone [16]. In contrast, Stadnyk et al investigated the effect of heat stress during and after resistance training with 70% 1RM intensity in young subjects, and they reported that there were no effects on muscle mass and strength [17].…”

“…The duration of the heat stress application was 1 [16] and 8 h [18] in previous studies, which is not realistic in a clinical setting. Moreover, the resistance training methods used in these studies were 50% 1RM × 30 repetitions × 3 sets [15] and 30% 1RM × 25 repetitions × 3 sets [16]. Therefore, it is possible that the increase in muscle mass and strength was in fact caused not by low-intensity but by high-repetition resistance training.…”