There were significant main time effects for medial whole muscle cross-sectional area (p=0.006) and averaged sites (p<0.001). There were significant main time effects for 1RM squat (p<0.001), bench press (p<0.001), and deadlift, (p=0.024), powerlifting total (p<0.001), Wilks Score (p<0.001), squat jump peak-power scaled to body mass (p=0.001), body mass (p=0.005), fat mass (p=0.002), and fat mass index (p=0.002). Muscle samples (n=15) were analyzed for fiber size, fiber type (MHC-I, -IIA, -IIX, hybrid -I/IIA) using whole muscle immunohistochemistry and single fiber dot blots, gene expression, and microRNA abundance. Whole muscle size was assessed at the proximal, middle, and distal vastus lateralis using ultrasonography and microbiopsies at the middle vastus lateralis site. Athletes were tested pre- and post-training on measures of body composition, jumping performance, isometric squat, and 1RM. Powerlifters were matched based on relative maximal strength, and randomly assigned to either a) 1-week overreach and 1-week step taper or b) 1-week overreach and 3-week exponential taper. Sixteen powerlifters (24.0±4.0 years, 174.4☘.2 cm, 89.8☒1.4 kg) participated in a 6-week training program aimed at peaking maximal strength on back squat (initial 1-repetition maximum : 174.7☓3.4 kg), bench press (118.5☒9.9 kg), and deadlift (189.9±41.2 kg). an exponential taper in strength athletes. Thus, the purpose of this study was to compare performance outcomes and skeletal muscle adaptations following a step vs. However, it is unknown which taper model is most effective for peaking maximal strength and positively augmenting skeletal muscle. The initial effects from AS appear to be maintained for several years.īefore major athletic events, a taper is often prescribed to facilitate recovery and enhance performance. The results of AS on VL morphology in this study were similar to previously reported short-term effects of AS on VL. The PAS group had larger type I, IIA, IIAB and IIC fiber areas (p or = 5 myonuclei. Enzyme-immunohistochemical investigations were performed to assess muscle fiber type composition, fiber area, number of myonuclei per fiber, internal myonuclei, myonuclear domains and proportion of satellite cells.
The effects of long- and short-term supplementation were compared. The morphological appearance of the vastus lateralis (VL) muscle from high-level power-lifters on long-term anabolic steroid supplementation (PAS) and power-lifters never taking anabolic steroids (P) was compared.
0 kommentar(er)
