Get Rock-Hard Abs in Sin City
What happens here won't stay here—because you're bringing back fab abs. How: the stand-up paddleboarding package at The Westin Lake Las Vegas Resort & Spa, 25 minutes from the Strip. You'll get lessons on swimming pool—calm Lake Las Vegas, a yoga session to limber up your muscles for the board, and neck and shoulder massages (earned 'em!). At dinner, order from the Westin's SuperFoodsRx menu items; doctors and nutritionists helped design the deceptively delicious meals, and they won't undo your belly's new SUP-slim look.
Tip from the trip: To get a taut tummy on dry land, you can apply the core tenets of SUP, say Paddle to the Core instructors, the trip's experts. Stand on a BOSU, holding a Body Bar; squat and "paddle" three strokes. Repeat on opposite side for one rep. Do 50 reps.
Cost: From $234 per night. Includes meals, SUP session, a yoga class and a massage. Available until December 30, 2012; WestinLakeLasVegas.com
More: Cross-Train With SUP
Head to Bikini Boot Camp in St. Lucia
Picture those bodies in Blue Crush—now put your face on one 'cuz you're going to be on track to look that hot with the help of this bikini boot camp. The BodyHoliday resort in St. Lucia has an awesome Lose It, Tone It program: You'll get a personalized food plan and training sessions (know-how you can use at home to continue to drop pounds), body-stats analysis, gratis spa treatments, group fitness classes and help finding the best waves to surf nearby. Plus, there are cool events like a booty shake-off on the beach with Dean Hodgkin, an international Zumba fitness expert (classes available November 18 to December 3). So, yeah, you're pretty much coming home in the best shape ever.
Tip from the trip: By the time you leave The BodyHoliday, you'll also be a plank pro. "Holding the pose for one minute will do more for your belly than 30 sit-ups," says Guto Williams, health leader at the resort, who uses the move in classes to help you define bikini-worthy abs.
Cost: From $4,449 for seven days. Includes meals, a daily spa treatment, group classes and lessons. Available year-round; TheBodyHoliday.com
More: Leg Workout: 6 Moves to Lean Legs
Find Your Zen in Maui
You, a yoga mat and a gorge, green coastline. It's the Total Travaasa package at new resort Travaasa Hana, Maui, where you'll also do alfresco strength classes; try your hand at archery; and take a "hip-notizing" hula lesson from a kumu (teacher), who'll help you shake off some 290 cals an hour. Hungry for more? Go on a four-hour horseback ride near 400-foot waterfalls; it costs extra, but we promise it's so worth it.
Tip from the trip: Besides workouts, you can also do DIY classes. So cool: Learn how to make a Hawaiian-fruit face mask that softens skin. Blend 1 mango, 2 tablespoon Greek yogurt, 1 teaspoon honey and 1 banana until smooth. Apply mask; remove with warm water after 10 minutes.
Cost: From $425 per night. Includes meals, most on-property activities and a daily $125 resort credit. Available year-round; www.travaasa.com/hana
More: Yoga Inversions: How to Do a Handstand Pose
Trek Through Wild Alaska
You might crash Facebook uploading all the epic pics from this trip of a lifetime. Country Walkers' six-day adventure takes you rafting on the Kenai River, kayaking in a bay (dolphin alert!) and hiking on the historic Iditarod Trail and through a coastal rain forest; you'll cover 4 to 10 miles daily. Along the way, you'll stay at a posh mountain hotel, a wilderness lodge and a seaside resort. Expect to eat your weight in fresh king crab, scallops, halibut and wild salmon in restaurants with jaw-dropping views. Your chances of spotting a brown bear or moose on this vacay? High to guaranteed.
Tip from the trip: Guides keep hikers happy with this not-strictly-for-the-trail mix: Combine 1/8 cup each dried cherries, raisins, sunflower seeds and coconut flakes with 1/4 cup each almonds and dark-chocolate chips. Serves 4. But we wouldn't fault you for not wanting to share.
Cost: From $3,898 for six days. Includes most meals, local wine and beer. Dates: June 24, July 15 and August 12, 2013; CountryWalkers.com
More: 10 Reasons to Train in Alaska
Take a Swing in Cancun
Le Blanc Spa Resort puts you in a swank suite (a butler unpacks and irons your clothes and preps your Jacuzzi while you play—so fancy!) and enlists pros and top techies to help you ace a swing and run serious short game. Set a five-night trip for the last week of December (peak rates apply) and the resort will give you tickets to see Usher perform nearby.
Tip from the trip: Golf director and PGA pro Phillip Krick Jr. says, "Closing your eyes, lift the club an inch off the ground before you swing" to feel and adjust your grip, helping you hit the ball far and fast.
Cost: From $296 per night (three-night minimum). Includes meals and access to two golf courses. Available to book through December 15, 2012; LeBlancSpaResort.com
More: 10 Beachfront Campgrounds in the Sunshine State
Stay in shape in a fitness class.