ARTICLE –
abstractEffect
of decline squatting versus neutral squatting exercises on quadriceps strength
and functional performance Arora V1, Zutshi K2,
Juneja H3, Zafar R4 1Faculty
of Allied Health Sciences, Department of Rehabilitation Sciences, 2Faculty
of Allied Health Sciences, Department of Rehabilitation Sciences, 3Amar
Jyoti Institute of Physiotherapy, 4Faculty
of Allied Health Sciences, Department of Rehabilitation Sciences,
Delhi, India
Abstract
The
purpose of this study is to find the effect of decline squatting and
neutral squatting exercises on quadriceps strength and functional
performance in normal healthy individuals. Method:
Physically active male samples (n=30) in the age group of 18-25 years
were included after they met the inclusion criteria. Participants were
randomly assigned to one of the two groups: a decline group and a
neutral group. The Mean+SD characteristics of 15 male Neutral squatting
subjects were: Age=23.27+1.49 years; Height=170.93+4.92 cm;
Weight=66.13+7.04 Kg and of 15 male Decline squatting subjects were:
Age=23.33+1.5 years; Height=170.46+6.22 cm; Weight=65.07+8.22 Kg. The
decline group (n=15) was required to perform Modified unilateral squat
protocol on a 250 decline board: 4 sets of 10 repetitions with 75% of 1
RM squat with 2 minutes of rest between each set thrice a week for 6
weeks. The neutral group (n=15) performed the same protocol of
single-leg squats on a horizontal surface. Dynamic strength (1RM) of
quadriceps and squat was calculated based on formula using amount of
weight lifted and number of repetitions. Quadriceps chair with an
addition of a strain gauge was used to measure quadriceps maximum
isometric strength. Vertical jump test (VJT) was performed by asking
subject to jumps vertically as high as possible using single arm and
leg to assist in projecting the body upwards. Results:
Both groups showed significant gains in quadriceps strength (dynamic
& isometric) and functional performance (1 RM squat) over 6
weeks of training. The decline squat protocol offered greater gains in
quadriceps strength and 1RM squat strength after 6 weeks of training.
There was however, no significant difference in vertical jump height
improvement between the two groups.
Key
words:neutral
squatting, decline squatting, quadriceps strength training, functional
performance, vertical jump test
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