Related by context. Frequent words. (Click for all words.) 63 hiking biking 62 biking 57 swimming biking 56 biking trails 56 aerobic exercise 56 aerobic 55 stair climbing 55 bicycling 53 jumping rope 53 camping hiking 53 climbing stairs 52 rollerblading 52 snowshoeing 51 passive recreation 51 aerobic workout 51 elliptical trainer 51 Frisbee golf 51 jogging 51 skiing snowboarding 50 cardio workout 50 hiking camping 50 sedentary 50 elliptical machine 48 mountain biking 48 cardio workouts 48 horseback riding 48 racquetball 48 nonmotorized 48 outdoors 48 strenuous exercise 48 exercisers 48 jog 47 lifting weights 47 cardio 47 physical exertion 47 uneven terrain 47 joggers 47 bicycle paths 47 bike paths 47 sturdy shoes 46 groomed trails 46 hiking trails 46 kayaking 46 Jogging 46 treadmill 46 picnic shelters 45 snowshoe 45 aerobic fitness 45 aerobics 45 aerobic capacity 45 sore muscles 45 hula hooping 45 exertion 45 stretching exercises 45 raking leaves 45 shoveling snow 45 plyometrics 44 strenuous 44 recreational 44 inline skating 44 stationary bikes 44 downhill skiing 44 stationary bike 44 Aerobic 44 canoeing 44 Biking 43 pedometer 43 riding stationary bike 43 calisthenics 43 staying hydrated 43 walkers 43 aerobics classes 43 tai chi 43 snowshoers 43 recreation 43 snowshoes 43 lift weights 43 rollerblades 43 parks playgrounds 42 snow shoveling 42 ultimate Frisbee 42 roller skating 42 walking briskly 42 paved surfaces 42 picnicking 42 stationary bicycle 42 skiing 42 Dance Dance 42 relieves stress 42 ice skating 42 assistive devices 42 riding bicycles 42 yoga Pilates 42 jumping jacks 42 tobogganing 41 sledding hill 41 sidewalks 41 exerciser 41 carpooling 41 exercise regimen 41 calf muscles