thankyou for your replies my steady state wattage is 160 at the moment with maximul sprint at around 230 haven't used the heart rate one may give it a whirl and see what it's doing(might find out I am dieing!)I started at 140 with my cts field test result ,but it has been getting easier. The problem is my only comparison is my hubby who can push 300 in steady state to over 400 maximul!( He is however superfit! )