Table 2

 Physiological variables in elite squash players corresponding to the respiratory compensation point for the 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; V˙o2max, maximal oxygen uptake; HRmax, maximal heart rate.
o2 (ml/min/kg)50.5 (4.3)57.6 (3.9)<0.01
co2 (ml/min/kg)42.5 (12.8)57.8 (4.8)<0.05
RER0.99 (0.07)1.00 (0.03)NS
e (litres/min)97.5 (9.1)106.6 (13.2)NS
HR (beats/min)179.8 (10.3)183.8 (10.6)NS
Bf (breaths/min)35.9 (5.7)44.7 (6.7)<0.05
Vt (litres)2.64 (0.51)2.43 (0.41)NS
%V˙o2max92.0 (5.6)90.5 (3.5)NS
%HRmax92.3 (2.6)95.2 (2.9)NS