Offers the simplest, most practical approach to fitness, anywhere, anytime. A liter of water weights threee pounds; a gallon weights nine pounds, making water bottles, (plastic or stainless) the best possible resistance devices. All it takes is a
Offers the simplest, most practical approach to fitness, anywhere, anytime. A liter of water weights threee pounds; a gallon weights nine pounds, making water bottles, (plastic or stainless) the best possible resistance devices. All it takes is a