I live in the Southern California desert - about an hour away from the Mexico border - so it gets extremely HOT during the summer, getting down to a chilly 90 degrees at night and up to 120 during the day. I can only do about 10-15 minutes, but I need to stay active as much as my body allows me to. Somebody had mentioned You Tube videos - does anybody have any links they can share for 10-15 minute, low impact (I have a messed up spine), workout videos? Would really appreciate if you could post… read more