Transcript Rowing Study - VO2max - Tasmanian Institute of Sport

Training at VO2max in Sub
Elite Rowers
Matthew Driller, James Fell, Andrew Williams, Cecilia Shing,
John Gregory, Jessica Webb, Diana Dickenson and Renee
Sushames.
Tasmanian Institute of Sport
Significance of the Problem
• ‘Velocity at VO2max’ termed (1984),
• VO2max & economy combined (Billat &
Koralszstein, 1996),
• Training at vVO2max shows positive effects (
• Runners (Smith et al 1999, Billat et al.),
• Swimmers (
• Cyclists (
• Training at v VO2max is reported (Daniels,
1998 & Noakes 2001).
Tasmanian Institute of Sport
Rationale and Aims
• To determine if training at vVO2max (HIT) in
Rowers can improve performance,
• To establish if training at vVO2max could be
more effective than intensive endurance
training (PT).
Tasmanian Institute of Sport
4 weeks
vVO2max
2.0 & 3.0 mM Po
Tasmanian Institute of Sport
HIT
Training
4 weeks
PT
Training
7 x 4min Test & DEXA
2000m TT
HIT
Training
7 x 4min Test & DEXA
2000m TT
PT
Training
7 x 4min Test & DEXA
2000m TT
Randomisation
Research Design
Results
Variable:
Pre:
Post:
Raw change:
% change:
% Body Fat
20.23
19.32
-0.91*
-4.5
2000m time
(seconds)
438.5
428.1
-10.4*
-2.4
2000m Power
(watts)
275.4
298.1
22.7*
8.2
VO2max
(mL/kg/min)
54.7
58.3
3.6*
6.6
VO2max (L/min)
4.104
4.372
0.268*
6.5
4-min all-out
Power (watts)
284.7
314.2
29.5*
10.4
4mmol.L-1
Power (watts)
199.7
219.9
20.2*
10.1
•
Tasmanian Institute of Sport
* Significantly Different
p = ≤ 0.05
Results
2000 metre Time Trial Performance
Raw Change (watts)
40
30
20
PT
HIT
10
0
-10
-20
1
2
3
4
5
6
Subjects
Tasmanian Institute of Sport
7
8
9
10
% Change
16
14
12
10
8
6
4
2
0
-2
-4
-6
-8
-10
-12
-14
•
* Significantly Different
p = ≤ 0.05
Tasmanian Institute of Sport
*
Variables
4mmol/L
Power (watts)
4-min all-out
Power (watts)
VO2max
(L/min)
VO2max
(mL/kg/min)
2000m Power
(watts)
2000m time
(seconds)
% Body Fat
Results
*
*
HIT
PT
*
Results
Variable
HIT %
Change
PT %
Chang P-value
e
95% Confidence
Interval (%)
Likelihood (%) of HIT being
Lower
Upper
Positive
Trivial
Negative
2000m time
(seconds)
-1.89
-0.56
0.02
-2.4
-0.3
75
25
0
2000m Power
(watts)
5.81
1.79
0.03
0.6
7.5
89
11
0
VO2max
(mL/kg/min)
6.97
-1.11
0.04
0.9
17.9
96
3
1
VO2max
(L/min)
6.35
-0.28
0.08
0.6
7.5
87
13
0
4-min all-out
Power (watts)
7.02
3.58
0.28
-1.5
8.3
88
7
4
Tasmanian Institute of Sport
Conclusion
• 6 athletes withdrew from the study,
• Structured training improves fitness &
performance,
• 7 out of 10 Rowers responded positively to
HIT,
• 2000m TT & relative VO2max improved &
• 4-min all-out Power increased.
Tasmanian Institute of Sport