While Jets coach Rex Ryan is living it up in the Bahamas, at least one of his dejected players is working out. Tim Tebow was spotted at spin studio Flywheel in Atlanta on Thursday night. Tebow came into a 6 p.m. class with his sister Katie Shepherd, a regular at the studio. After class, he happily posed for photos with his bulging biceps around other riders and instructor Ann Marie Weeks. While Tebow was sweating it out, Ryan was sweating in the sun, showing off his new arm tattoo — a kittenish cartoon image of his wife dressed in a Mark Sanchez jersey depicted in a sexy pose. Was there no room for rival Jet QB Greg McElroy’s initials in there somewhere?