You know you need to step up your training before your next big trip, but you're not exactly sure how? You're not alone. Fortunately, a growing number of trainers have answers. Marcus Shapiro, an Atlanta trainer, founded Fit for Trips in 2009 and now works with outfitters like Abercrombie & Kent to design training plans specifically for adventures. Download the four-to-twelve-week programs—complete with video instruction—onto your iPhone. From $169; fitfortrips.com. Sol Fitness Adventures, run by California trainer Melanie Webb, offers in-person training packages ranging from one week to six months for trekking expeditions. On-site sessions in Santa Barbara, Mammoth Lakes, and Los Angeles come with nutrition consultations and weekend warm-up trips in the Sierra. From $3,000; soladventure.com. Nudge Training, based in Mississauga, Ontario, offers customized training programs, including healing treatments like Reiki, to prepare people for adventures such as heli-skiing and climbing Kilimanjaro. $80 per hour; nudgetraining.com.