Third party fitness tracking applications

Aha, then I'd rather stay away from .fit as well.

This brings me to the other solution: changing the CSV export to be more similar to the format below. Where in the code should I best attempt this?

Minutes, Torq (N-m),Km/h,Watts,Km,Cadence,Hrate,ID
0.017,0,6.2,0,0.006,4,0,0
0.033,0,8.4,0,0.008,17,67,0
0.05,0,10.7,0,0.01,0,67,0
0.067,0,12.6,0,0.014,0,62,0
0.083,0,12.6,0,0.018,0,62,0
0.1,0,15.1,0,0.022,0,62,0
0.117,0.3,14.7,37,0.027,0,62,0
0.133,1.2,13.8,132,0.031,35,62,0
0.15,1.3,13.9,147,0.033,53,62,0
0.167,1.2,14.7,149,0.037,59,62,0
0.183,1.2,15.1,150,0.041,63,62,0