i have been running since sept2002 ,training for flm, which i completed
everything o.k since just usual stuff,black toenails etc.
in recent couple of weeks i have noticed my heart rate has increased,by 10-20% on my runs i feel fine otherwise
no temp or anything , im hoping that it is simply to do with heat time of year,as i havent run in heat of summer before,
any wise bod out there can tell me this is case?????