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Sun, sea and . . . sweat?

Holiday heroics: From top left, Deirdre Reynolds goes mountain biking in Bolivia; surfing in Australia; trekking in Peru and abseiling in JerseyForget lazing by the pool and guzzling sangria -- from tough-love boot camp to 100km treks, this year's hottest holiday trend is for getaways that make you fitter -- not fatter.

Adventure addict Deirdre Reynolds picks her top hardcore hols you may need another holiday to recover from.

  • Leave your high heels at home -- the ankle-trembling Inca Trail is one of the most challenging but rewarding treks on earth.

The classic four-day Inca trail traces more than 40km through the Andean mountains. And sweeping 4,200 metres high into the Gods, it's not just the scenery that will leave you breathless.

But the moment you discover the lost citadel at sunrise on day four makes it all worth while -- and just think of those thighs afterwards!

See www.abbeytravel.ie

  • It's best known as an OAP's paradise -- but there's another side to Channel Island Jersey. Not just for nanas, the picturesque escape is framed by vertiginous cliffs that beg to be abseiled down, platinum beaches perfect for X-sailing (wind-propelled go karts) and hidden woodland trails made to be explored by horseback. Try the Radisson Blu's three-night 'Active Island' package.

See radissonblu.com/hotel-jersey

  • When in Rome, do as the Romans do -- when in Oz however, learn to surf! Practically a national pastime, doing your best Point Break impression is mandatory for visitors Down Under. Find out how to surf, stand or simply look good as you wipe out at any of the surf camps dotted along the coast including Manly Surf School outside Sydney or Reef 2 Beach Surf School in Agnes Water/Town of 1770. With waves like a warm bath, the sun beating down and body-beautiful instructors, it certainly beats taking to the Atlantic.

See www.surfingaustralia.com

  • Whatever you do -- don't pull the brakes! It seems common sense not to mountain-bike at breakneck speed down a route affectionately known as 'Death Road', but don't let that stop you from taking to the infamous Bolivian highway on two wheels.

Mammy wouldn't approve -- but surviving the lethal 64km downhill drop through nosebleed-inspiring scenery outside La Paz is a rite of passage for Irish backpackers.

And if the cycling doesn't shift a few calories, whizzing past the spot where others plunged to their deaths should sweat them out!

See www.madness-bolivia.com

  • A staycation with a twist, spectacular clifftop health resort Caislean Ui in West Cork is where celebs here go to fight flab -- fast. And if you've got an LBD to squeeze into ASAP, this dirty weekend -- muck, sweat and sand, that is -- leaves no excuses.

Think early starts, porridge and fresh fruit for breakfast, invigorating walks and heart-pumping kayaking.

Choose from Activity, Detox or more intensive Boot Camp weekends -- and if the snooze button gets the better of you, there are personal trainers on hand to crack the whip.

Contact Caisleanui@gmail.com

Irish Independent