Low-Load Blood Flow Restriction Squat as Conditioning Activity Within a Contrast Training Sequence in High-Level Preadolescent Trampoline Gymnasts
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Low-Load Blood Flow Restriction Squat as Conditioning Activity Within a Contrast Training Sequence in High-Level Preadolescent Trampoline GymnastsAutor(es)
Data
2022-06-13Cita bibliográfica
Yang S, Zhang P, Sevilla-Sanchez M, Zhou D, Cao J, He J, Gao B and Carballeira E (2022) Low-Load Blood Flow Restriction Squat as Conditioning Activity Within a Contrast Training Sequence in High-Level Preadolescent Trampoline Gymnasts. Front. Physiol. 13:852693. doi: 10.3389/fphys.2022.852693
Resumo
[Abstract] To investigate the effects of implementing low-load blood flow restriction exercises (LL-BFRE) instead of high-load exercises (HL-RE) in a contrast training program on strength and power performance of high-level young gymnasts. Fifteen high-level pre-pubescent trampoline
gymnasts (national level, Tanner Stage II, intermediate experience in strength training) were
divided into two groups to complete the same structure of a ten-week contrast strength training
program differing only in the configuration of the first resistance exercise of the contrast
sequence. The LL-BFRE group (n = 7, four girls, 13.9 ± 0.4 y) performed the first resistance
exercise of the contrast with LL-BFRE (20%–30% 1RM, perceived pressure of 7 on a scale
from 0 to 10). The HL-RE group (n = 8, four girls, 13.8 ± 0.5 y) trained the first resistance
exercise of the contrast sequence with moderate-to-high load (60%–85% 1RM). Before and
after the training period, isometric mid-thigh pull (IMTP), squat jump (SJ), counter movement
jump (CMJ), and drop-jump (DJ) were performed to evaluate the effect of the intervention on
strength and power capacities as primary outcomes. Changes in participants’ anthropometric
measures, muscle mass, left and right thigh girth, IMTP relative to bodyweight (IMTP-R),
eccentric utilization ratio (EUR), and reactive strength index (RSI) were assessed as secondary
outcomes. There was no significant interaction (p > 0.05) between group x time in any power
and strength outcome, although SJ and EUR showed a trend to significant interaction (p=0.06
and p = 0.065, respectively). There was an overall effect of time (p < 0.05) in all power and
strength variables (CMJ, SJ, EUR, DJ, RSI, IMTP, and IMTP-R). There was a significant
interaction in muscle mass (MM) [β = 0.57 kg, 95% CI = (0.15; 0.98), t13 = 2.67, p = 0.019],
revealing that participants in LL-BFRE increased their muscle mass (6.6 ± 3.1%) compared to
HL-RE (3.6 ± 2.0%). Anthropometric variables did not present any group or interaction effect.
However, there was a time effect (p < 0.05). Implementing LL-BFRE in place of HL-RE as a
conditioning activity in a contrast training sequence might be equally effective in improving
lower-body strength and power in preadolescent trampoline gymnasts.
Palabras chave
Blood flow restriction training
Young athletes
Contrast strength training
Jump height
Maximal isometric strength
High-load resistance exercise
Young athletes
Contrast strength training
Jump height
Maximal isometric strength
High-load resistance exercise
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CCBY 4.0
ISSN
2076-328X