Hello everybody! Im 31 year old male and have being bodybuilding 10 years naturally. Im 5 feet 10 inches and 172 pounds (im ectomorph bodystructure) i don't have measured my bodyfat but i quess its around 12%. Goal is to recomp im eating little over my maintenance and liftin 7 hours a week and doing aerobics 3 hours a week and feeling great. Now the question: i get really bad calve pain and pumps doing cardio on treadmill (won't get them on slower pace and lower incline but get bored by doing that and also my hips will kill me if i do more cardio) my lungs could handle lots of abuse so id like to push my self a bit more. Is there any tricks that could alleviate my problem instead of PEDs? I strech my calves and occasionally give them some massage. Any help would be appreciated