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Unformatted text preview: leg extension (Cr: +14.9kg vs placebo: +10.7kg)
and had concomitantly greater increases in body
mass and lean tissue mass as measured by DXA.
The lack of a Cr effect for bench-press strength may
have been the result of a lower training volume since
only one exercise during the training programme
targeted the upper. The results of this study also
could have been influenced by the group differences
in baseline strength (Cr group was significantly
stronger than the placebo group).
There are also a number of studies that have not
been able to detect a significant Cr effect following
Sports Med 2005; 35 (2) 114 supplementation. Syrotuik et al. randomly assigned 21 men to one of three resistance training
groups in which the volume and intensity of training
were equated. The first group ingested Cr (0.3 g/kg
BW for 5 days) and then a maintenance placebo, the
second group followed the same loading programme
followed by a maintenance phase (0.03 g/kg BW for
32 days). The final group consumed the placebo for
the total 37-day period. Resistance training consisted of a periodised programme and strength was
assessed by 1RM incline leg press and bench press.
These measures were also expressed relative to body
mass by dividing 1RM (kg) measures by each subjects body mass (kg). 1RM measures were taken
before loading phase, after the 5-day loading phase
and finally after the 32-day maintenance phase.
Two-way ANOVA with repeated measures and
Newman-Keuls post hoc analyses determined that
each group significantly increased all 1RM measurements. There were significant main effects for
all groups over time for 1RM measures of bench
press and leg press, total lifting volume and
strength-to-mass ratio, but no significant group or
interaction effects between the groups. The results of this study indicated that neither Cr loading
or Cr loading plus a maintenance programme, in
combination with resistance training controlled for
training volume and intensity, were any more effective than resistance training alone. These findings
suggest that C...
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