I am training to climb Mt. McKinley where I will be pulling uphill a 60lb sled with a 60lb pack on my back for 8-9 hours. I would like to know, other than actually pulling a sled, what exercises should I engage in that will prove beneficial?
Currently I climb the 20 floor stairwell at work with a 60lb pack during lunch and I cycle everywhere, approx. 250km a week, on a fixie with a hard ratio.
Is cycling working the same muscles that would be used during sled pulling? How can I prepare/improve for an endurance based sled pull?
All the information I can find is heavy sled pulls to improve acceleration, nothing geared towards literally pulling a sled...