Table 3

 Physiological variables in elite squash players corresponding to the maximum work load for treadmill incremental test to exhaustion (TT) and squash specific graded test (ST) (n  =  7)

VariableTTSTp Value
Values are mean (SD).
o2, Oxygen uptake; V˙co2, carbon dioxide production; RER, respiratory exchange ratio; V˙e, minute ventilation; HR, heart rate; Bf, breathing frequency; Vt, tidal volume.
o2 (ml/min/kg)54.9 (2.5)63.6 (3.0)<0.001
co2 (ml/min/kg)51.4 (15.2)68.5 (3.5)<0.05
RER1.10 (0.05)1.10 (0.06)NS
e (litres/min)133.9 (12.8)149.0 (15.2)NS
HR (beats/min)194.8 (8.6)193.0 (7.9)NS
Bf (breaths/min)50.2 (8.7)59.1 (6.6)<0.05
Vt (litres)2.70 (0.44)2.72 (0.30)NS