For many New Yorkers with manic schedules, getting to the gym can be a challenge in and of itself. But if you're interested in making a commitment and going the extra mile, boutique fitness studios may have the plan for you. Here are five fitness challenges in NYC, ranging from intense double workouts to six-week feats.

SoulCycle "Double"

Length: 90 minutes A normal sweat session at

Length: 90 minutes

A normal sweat session at SoulCycle is 45 minutes, but some warriors opt for back-to-back classes. That's 90 minutes of spinning, including arm and core exercises, burning 1,000-1,400 calories. The motivational mantras and lively playlists of upbeat dance music help you power through. Signups ongoing. $68/double ride; various locations, soul-cycle.com

(Credit: SoulCycle)

Barry’s Bootcamp Academies

Length: 25 days Through the gym's Academy program,

Length: 25 days

Through the gym's Academy program, you can take classes at the same time each day during the week for a month -- so turn it into your own 25-day challenge. Work your abs, back, chest butt and legs during 50- or 60-minute workouts that burn 1,000-1,200 calories per class. Signups for the academies are the first Monday of each month. $350-$435; various locations, barrysbootcamp.com

(Credit: Thomas Engstrom)

New York Sports Clubs’ BODYPUMP

Length: 30 days This barbell class promises to

Length: 30 days

This barbell class promises to sculpt, tone and strengthen physiques through lots of repetition. The 55-minute workout, which consists of push-ups, clean-and-presses and hang cleans, obliterates 500-plus calories. BODYPUMP classes are offered multiple times a week, so try a 30-day trial membership and go to as many as you can. Your arms will thank you. Signups ongoing. $30/30 days for non-members; various locations, mysportsclubs.com

(Credit: New York Sports Clubs)

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Flywheel Sports’ FlyBarre Challenge

Length: 6 weeks It's one hour at a

Length: 6 weeks

It's one hour at a time for this six-week challenge. Workouts incorporate resistance bands, a blue ball and a ballet barre for abs, leg, butt and arm exercises that will sculpt your physique. All segments are high energy, and some use a bit of choreography. The challenge consists of four classes a week, and you can track your progress with weekly measurements. The next challenge is slated for mid-September. $775-$1,075; various locations, flywheelsports.com

(Credit: Yeong-Ung Yang)

Alycea Ungaro's Real Pilates' Pilates Promise

Length: 10 weeks In this holistic challenge, participants

Length: 10 weeks

In this holistic challenge, participants choose a program (upper body, lower body or flexibility and posture) and target three problem areas during three hour-long classes a week that burn 400-500 calories each. You'll also map out a nutrition strategy with a Holistic Health Coach for specific, measurable results. Signups ongoing. $2,625, including nutrition sessions; 177 Duane St., 212-625-0777, realpilatesnyc.com

(Credit: Alycea Ungaro's Real Pilates)