Less than 2 months left before ski season starts. I've got to kick my ass into gear to rebuild as much strength as I can in order to avoid injury. I longboard about 15 minutes every day, which does almost nothing (or might be worse than nothing since it leads to uneven development in the dominant leg).
My equipment is limited to my physical body, plus a TRX knockoff (a suspension training system), thin yoga mat, and a hard foam roller.
At this point I'm not looking to spend a lot of time on arms or shoulders (other than if they're part of a full-body exercise; after all, this is damage control time!). I'm thinking core, quads, hamstrings and glutes.
What are the most efficient, brief workouts I could do with what I have in order to target skiing muscles?