Anders The Peak
2014-06-14, 07:39
ABSTRACT
This study investigated the effects of varying strength exercises and/or loading scheme on muscle cross-sectional area (CSA) and maximum strength after four strength training loading schemes: constant intensity and constant exercise (CICE), constant intensity and varied exercise (CIVE), varied intensity and constant exercise (VICE), varied intensity and varied exercise (VIVE). Forty-nine individuals were allocated into five groups: CICE, CIVE, VICE, VIVE, and control group (C). Experimental groups underwent a twice a week training for 12 weeks. Squat 1RM was assessed at baseline and after the training period. Whole quadriceps muscle and its heads CSA were also obtained pre- and post-training. The whole quadriceps CSA increased significantly (p<0.05) in all of the experimental groups from pre- to post-test in both the right and left legs: CICE: 11.6% and 12.0%; CIVE: 11.6% and 12.2%; VICE: 9.5% e 9.3% and VIVE: 9.9% and 11.6%, respectively. The CIVE and VIVE groups presented hypertrophy in all of the quadriceps muscle heads (p<0.05), while the CICE and VICE groups did not present hypertrophy in the vastus medialis and rectus femoris (RF), and in the RF muscles, respectively (p>0.05). The CIVE group had greater strength increments than the other training groups (Effect size confidence limit of the difference -ESCLdiff CICE: 1.41 - 1.56; VICE: 2.13 - 2.28; VIVE: 0.59 - 0.75). Our findings suggest: a) CIVE is more efficient to produce strength gains for physically active individuals; b) as long as the training intensity reaches an alleged threshold, muscle hypertrophy is similar regardless of the training intensity and exercise variation.
Länk (http://europepmc.org/abstract/MED/24832974)
Intressanta iakttagelser för den intresserade.
Mycket möjligt att den redan har varit upp här.
This study investigated the effects of varying strength exercises and/or loading scheme on muscle cross-sectional area (CSA) and maximum strength after four strength training loading schemes: constant intensity and constant exercise (CICE), constant intensity and varied exercise (CIVE), varied intensity and constant exercise (VICE), varied intensity and varied exercise (VIVE). Forty-nine individuals were allocated into five groups: CICE, CIVE, VICE, VIVE, and control group (C). Experimental groups underwent a twice a week training for 12 weeks. Squat 1RM was assessed at baseline and after the training period. Whole quadriceps muscle and its heads CSA were also obtained pre- and post-training. The whole quadriceps CSA increased significantly (p<0.05) in all of the experimental groups from pre- to post-test in both the right and left legs: CICE: 11.6% and 12.0%; CIVE: 11.6% and 12.2%; VICE: 9.5% e 9.3% and VIVE: 9.9% and 11.6%, respectively. The CIVE and VIVE groups presented hypertrophy in all of the quadriceps muscle heads (p<0.05), while the CICE and VICE groups did not present hypertrophy in the vastus medialis and rectus femoris (RF), and in the RF muscles, respectively (p>0.05). The CIVE group had greater strength increments than the other training groups (Effect size confidence limit of the difference -ESCLdiff CICE: 1.41 - 1.56; VICE: 2.13 - 2.28; VIVE: 0.59 - 0.75). Our findings suggest: a) CIVE is more efficient to produce strength gains for physically active individuals; b) as long as the training intensity reaches an alleged threshold, muscle hypertrophy is similar regardless of the training intensity and exercise variation.
Länk (http://europepmc.org/abstract/MED/24832974)
Intressanta iakttagelser för den intresserade.
Mycket möjligt att den redan har varit upp här.