Effects Of Power-based Strength Training On Physical Performance In Female Basketball Players

Objective: The aim of this study was to compare the effects of monitoring strength training volume using different levels of power loss(PL)on body composition,maximal strength,and explosive power in female basketball players from a sports college during the pre-season period.A traditional percentage-based strength training volume program(fixed-load,FL)was used as the control group.Method: The study included 30 female basketball players from XX Sports University who were recruited based on their adherence of at least 97%.The participants were randomly assigned to one of three groups: a power loss 10% group(PL10=11),a power loss 20% group(PL20=11),and a traditional fixed-load group(FL=8).All subjects followed a progressive waving design for load intensity,with training session1 at 80-90% of their one-repetition maximum(1RM)and training session 2 at 60-70%of 1RM.The difference between the groups was in the number of repetitions,with the experimental groups monitoring power loss to a set threshold(10% or 20%)after training,while the control group completed a set number of repetitions.The study lasted for 10 weeks,during which training load information was recorded.The participants completed pre-and post-tests,which included measurements of their onerepetition maximum for weighted behind-the-neck squats,squat jump(CMJ)and static squat jump(SJ),reactive-strength index(RSI)in vertical jump touch-up,20-meter sprint(T20M),change of direction test(505),and a body composition assessment.Results: All three groups showed significant improvement in back squat 1RM,but the PL10 and PL20 groups demonstrated slightly greater percentage changes and within-group effects than the FL group.Additionally,the PL20 and PL10 groups showed significant improvement in all jumping abilities,whereas the FL group did not show significant improvement in jump touch height.Furthermore,only the PL20 group exhibited a significant improvement in T20 M.Finally,significant within-group differences were observed for all body composition-related variables in the PL10 and PL20 groups,but not in the FL group.Conclusion:(1)Both autoregulated volume programs(10% and 20% power loss)and the traditional fixed training volume program(FL group)were effective in improving maximal strength,with the autoregulated approach showing a slight advantage in training effectiveness.Interestingly,the PL10 group benefited more from the training volume compared to the PL20 and FL groups,indicating that the autoregulated conditioning strategy and the constant training volume protocol did not follow the same dose-response relationship.(2)Regarding jumping ability,the PL20 group showed a significant improvement in long jump performance,while the PL10 group outperformed the FL group.(3)Only the PL20 group demonstrated a significant improvement in short-distance sprint ability,while the PL10 group showed a significant improvement trend and requires further verification for its adaptation to short-distance sprint performance.(4)The PL10 group was the only group that significantly improved the ability to change direction quickly while supporting the left and right legs,with a better intervention effect than the PL20 and FL groups.(5)The autoregulated training volume approach produced beneficial improvements in relevant body composition parameters,such as fat mass reduction,while the traditional training volume program did not demonstrate significant improvements.Suggestions:(1)Players undergoing intensive pre-season or in-season training can effectively monitor their training volume by setting low to medium power loss thresholds in their strength training routines.(2)The use of power-based training methods for strength training should be further developed and refined by physical trainers and practitioners.Additionally,the concept and practice of power loss monitoring training volume can also be applied to other types of strength training beyond the use of barbells.(3)High-quality research by national and international sports scientists and practitioners is still needed to refine power-based strength training.The concept and program of power loss to objectively quantify the degree of neuromuscular fatigue can be applied to a wider range of training methods,not just strength training,and with the development of sports technology,it can gradually be applied to other strength training as well.