After the indulgence of Christmas, many of us have health-focused resolutions for January.  Maybe you have a specific goal in mind – you want to run a mile without stopping or do a full press up. Or perhaps you just know you want to move your body to feel healthier, stronger and better mentally, as well as physically. January is as good a time as any to roll out the yoga mat, pull on your trainers or just get jumping around your living room.