vickster
Squire
Do you get issues doing anything other than cycling? Squatting, stairs, kneeling, running, sitting? It may be a muscle imbalance, cycling is very quad heavy and you need to consciously use the other leg/bum musculature
You need a good physio to check everything, worth spending the £50 or whatever for an initial appointment
Maybe you are getting tired at the 40k mark, not a short distance on an MTB and over stressing your legs in some way, losing form, core is slackening all sorts
You need a good physio to check everything, worth spending the £50 or whatever for an initial appointment
Maybe you are getting tired at the 40k mark, not a short distance on an MTB and over stressing your legs in some way, losing form, core is slackening all sorts