Tested: Spinervals 4.0 Muscle Breakdown Workout DVD

While I’m not one to spend lots of time on the indoor trainer, sometimes it’s unavoidable, and having some sort of workout plan or other distraction is vitally important. One of the big names in indoor trainer workouts is Spinervals, with 20+ workouts for serious cyclists. Here is a review of Spinervals 4.0: Muscle Breakdown.

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