Abstract
This study examined the physiological, physical and technical responses to repeated-sprint
training in normobaric hypoxia [RSH, inspired fraction of oxygen (FiO2) 14.5%] vs. normoxia (RSN, FiO2 20.9%). Within 12 days, eighteen well-trained tennis players (RSH, n=9 vs. RSN, n=9)
completed five specific repeated-sprint sessions that consisted of four sets of 5
maximal shuttle-run sprints. Testing sessions included repeated-sprint ability and
Test to Exhaustion Specific to Tennis (TEST). TEST’s maximal duration to exhaustion
and time to attain the ‘onset of blood lactate accumulation’ at 4 mMol.L−1 (OBLA) improvements were significantly higher in RSH compared to RSN. Change in time
to attain OBLA was concomitant with observations similar in time to the second ventilatory
threshold. Significant interaction (P=0.003) was found for ball accuracy with greater
increase in RSH (+13.8%, P=0.013) vs. RSN (–4.6%, P=0.15). A correlation (r=0.59,
P<0.001) was observed between change in ball accuracy and TEST’s time to exhaustion.
Greater improvement in some tennis-specific physical and technical parameters was
observed after only 5 sessions of RSH vs. RSN in well-trained tennis players.
Key words
sport-specific fitness - hypoxia - repeated-sprint ability - V̇ O
2max
- ball accuracy - tennis performance