Based on the linked source; automatically prepared and checked against the original report.
Study Design
Researchers studied two male and four female world-class wheelchair tennis players during laboratory arm-cranking tests and simulated hard-court matches. They measured oxygen uptake, heart rate, and blood lactate to establish maximum values and lactate-threshold and accumulation markers for interpreting match intensity.
Match Intensity
Match measurements showed median oxygen uptake and heart rate at 56.1% and 72.7% of laboratory maximum values, respectively. The analysis used three zones based on lactate threshold and onset of blood lactate accumulation. Oxygen uptake at the lactate threshold was positively associated with time in zone 1, which represented intensity at or below that threshold.
Service And Return Games
Median oxygen uptake was higher during service games than return games: 22.5 versus 18.8 mL/kg/min. Service games had shorter cumulative time in zone 1 and longer time in zone 2. The study’s conclusion was that players spent most match time at moderate intensity between the lactate threshold and onset of blood lactate accumulation. A higher percentage of maximum oxygen uptake at the lactate threshold was associated with longer time in lower-intensity zones.
