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Les mouvements au poids de corps ne sont pas efficaces !

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Les mouvements au poids de corps ne sont pas efficaces !

Messagepar audiomaniac le 09/09 19h32

La conclusion de l’étude :

Conclusions: A
six week training program of
bodyweight exercise was not sufficient
to improve strength or functional
performance measures included in this
study. Further research with overload
training is recommended.

l’étude :

The Effect of Surface Angle on a Six-Week Single Leg Squat Exercise Program.
Newsham KR, Bennett JE, Howell
TG: Saint Louis University, St.Louis, MO

La source : Journal of Athletic Training S-158 Volume 47 • Number 3 (Supplement) May 2012

Context: Single leg squat (SLS) is
utilized in rehabilitation of lower
extremity injuries. A SLS performed
on a declined angled surface (DSS)
increases quadriceps activity and is
recommended for treating patellar
tendinopathy. Little is known regarding
the efficacy of SLS or DSS in regard
to strength or functional performance.

Objective: To evaluate the effect of
surface angle during SLS on
quadriceps strength and functional
performance. Design: Randomized
control trial. Setting: Research
laboratory. Patients or Other

Participants: Twenty-six healthy,
physically-active, volunteers were
stratified according to injury history
and physical-activity level, and then
randomly assigned to the level surface
SLS (LSS, n=10; 20.89+ 1.76yrs,
168.3+8.4cm, 68.68+ 9.85kg),
decline surface SLS (DSS, n=10;
20.89+2.84yrs, 171.94+8.7cm, 70.18
+13.38kg) or control (CON, n=6;
20.83+2.92yrs, 166.33 + 5.98 cm,
66.43+8.84kg). Two participants were
excluded after missing >25% of
exercise sessions. Interventions:
Pretest-posttest measures of strength
and functional performance included
a modified Star Excursion Balance Test
in anterior (YANT), posteriolateral
(YPL), and posteriomedial (YPM)
directions, Step-Up-and-Over-Test
(SUO, NeuroCom, Inc), single leg hop
(SLH), single leg triple hop (SL3H)
and peak torque at 60 degrees/second
(Biodex, Inc). Participants completed
practice trials of all tests to familiarize
themselves with the exercises and
equipment. Participants assigned to
LSS or DSS (15° angle) performed
3x15 repetitions, twice/day, 3 days/
week for 6 weeks, with bodyweight
resistance only. Exercise sessions
were supervised. All participants were
encouraged to maintain normal
physical activity for the duration of
this study. Main Outcome Measures:
The dependent variables were
the change scores for normalized
YANT, YPL, and YPM, SUO Lift-up
and Impact Indices (LI and II,
respectively), SLH, SL3H, and peak
torque at 60 degrees/second. ANOVA
was utilized to compare the groups
with a Bonferroni post-hoc analysis.
Alpha was set at .05. Results: We
found no significant differences
between groups in regard to changes
in functional performance measures.
All groups had negligible decreases in
LI and II (LSS -2.0+9.8; DSS
-0.66+7.66; CON -1.83+9.43; p=
.945; LSS -1.44+7.6; DSS -2.66+9.19;
CON -6.5+5.2; p=.468, respectively).
Changes in SLH and SL3H were not
statistically significant (SLH: LSS
5.45+7.47; DSS 5.44+10.21; CON
15.18+12.59, p=.140; SL3H: LSS
13.46+18.82; DSS 14.67+16.98;
CON 27.58+24.70, p=.364). No
significant differences were identified
between groups for YANT (LSS
-1.82+4.12; DSS 7.66+15.26; CON
4.29+9.83, p=.198), YPL (LSS 19.5+10.45;
DSS 11.14+7.57; CON 14.82+7.17,
p=.516) or YPM (LSS 12.64+13.5; DSS
9.99+17.27; CON 15.39+7.14, p=.765).
The only significant difference between
groups was the change in peak torque
at 60 degree/second with the control
group demonstrating greater change
than either of the treatment groups (LSS
-2.044+15.11, DSS -7.48+9.95, CON
12.433+2.78, p= 0.24).

Conclusions: A
six week training program of
bodyweight exercise was not sufficient
to improve strength or functional
performance measures included in this
study. Further research with overload
training is recommended.

audiomaniac
 
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