I've been running consistantly since OCT and my best 3-mile at the OSO was a 21:30 or something like that. not bad but not good either so i've been sticking with my running. Well lately, i've been having trouble with my calves. When i go for a run, I feel fine the first mile and a half. I've timed myself and my mile and half time is averaging about 9:20ish. But after the mile and a half i run into problems. My calves get seriously pumped and feel like their cramping up, except not as sudden as a cramp usually is. I dont feel worn out, out of breath, etc.. its just my calves really get to me. It gets to a point where i can barely lift my feet and i'm just shuffling down the trail. Anyways, i've been trying different things to fix it but nothing seems to really help but I think the problem may be with the frequency of my runs. I changed my routine up about 3 weeks ago and thats when this stuff started happening. Before i changed, i ran 3 times a week/ every other day. I never really had any problems during that period (except at the beginning when i had calf pains and shin splints.. but that seems to be the norm for anyone starting out). So i believe the problem is that while i'm fine cardio wise, my calves dont have the endurance required for long runs because of the way i'm training. My routine is now like this: Monday - Lift Tuesday - OFF Wednesday - Lift Thursday - Run (Speedwork) Friday - Lift Saturday - Run Sunday - Run I'm thinking that big gap is whats causing my calves to feel cramped. If i increase my run days to 4 a week while keeping my overall weekly mileage down (to prevent shin splints) and slowly work up to where i'm running 3 miles+ each time i run, do you guys think that will help my problem?