Sunday 10 miler

Had a 10 mile trot round this morning. Quite sunny. Sprints, shorts tech top. 1 square of flapjack.
After last couple of bad weeks thought would go with a slow steady run keeping heart rate in my fat burn zone. (155ish) Trying to identify why things start to go wrong at 8ish miles, hence the flap jack. Had a bite @ 5 and 8m. By 8.6 familiar fatigue appeared in the hip area. CV barely working all muscles fine. Can now rule out running out of fuel. Comes back to hips and more specifically hip flexors.
Next I will breakout the kettlebells, have purposely left them off recently. Will do plenty of swings to re? strengthen the hips.

Details of run here