If you've ever collapsed in a ball of sweat at the gym after a session on a step machine or treadmill, then imagine walking across the open sea for 48 hours without sleep in a giant human hamster wheel.

Chris Todd has and knows "it is going to be one of the toughest things I’ve ever done." But the British engineer plans to step out smartly next month anyway to make the perilous and peculiar journey across the Irish Sea, a grueling nonstop 66-mile slog he's doing to raise money for charity.

If all goes well, the 35-year-old will cross from Wales to Ireland in what he hopes are calm waters. His vessel is a big steel paddle wheel lined with metal mesh that can only handle waves up to 3 feet.

Todd, who lives in Bromham in the English county of Wiltshire, worked with his wife and friends in his garden for nearly a year to build what he calls a Tredalo. To keep it turning on the water over the two-day journey, he will need to burn 36,000 calories, the amount spent in almost three weeks of exercise. To keep up his strength, he'll drink about 30 liters of water and eat about 60 chocolate bars.

"It will be like running 10 back-to-back marathons," he told the Daily Mail.

This isn't the first daredevil challenge Todd has undertaken for charity. His previous exploits include running six marathons in six days across the Gobi Desert in Mongolia and trekking through the Arctic in 112-degree wind chill.

This time, his goal is to raise £20,000, or more than $32,000, for two charities - the Royal National Lifeboat Institution and Wiltshire Blind Association.

Todd said he got the idea for the contraption while he was rowing across a lake and, so far, except for a couple hours at sea, that's the only place he has tested it. Two days in open water is "totally different," he told the BBC. "But the only way we are going to know if it will stand up to the battering from the waves is to actually do it."

The adventurer, dubbed the "hamster man" by a yachting magazine, originally set out to cross the English Channel in his wheel. Regulations and high costs eventually rerouted him north.

Todd told The Sun that because his route will put him in shipping lanes he will be accompanied by a safety boat equipped with safety flares.

Despite the physical and mental challenge of pedaling across the sea, Todd says the journey will be worth it. And not only for the charities that will benefit.

As he told the Mail, "I am looking forward to a cold Guinness on arrival."

To make a donation and for more information on Todd's "walk," check out his website here.

Related on HuffPost:

Loading Slideshow...
  • Boy Donates Disney Trip To Needy Family

    Most 9-year-olds can only dream of experiencing the magic of Disney World. But for <a href="http://www.huffingtonpost.com/2012/05/29/brendan-haas-disney-world-fallen-soldier_n_1552635.html?ref=greatest-person-of-the-day" target="_hplink">Brendan Haas</a>, his only dream was to give that experience to someone else. According to <a href="http://www1.whdh.com/news/articles/local/south/12007594149745/boy-gives-family-of-fallen-soldier-a-trip-to-disney-world/" target="_hplink">whdh.com</a>, Haas won the trip, only to donate it to the family of a fallen soldier on Memorial Day. Too good to be true? Just wait until you hear what <a href="http://www.huffingtonpost.com/2012/06/01/brendan-haas-boy-who-dona_n_1562574.html?ref=impact" target="_hplink">Haas did with his reward</a>. Read the whole story, <a href="https://editorial.huffingtonpost.com/entry/?referrer_url=http://www.huffingtonpost.com/2012/05/29/brendan-haas-disney-world-fallen-soldier_n_1552635.html?ref=greatest-person-of-the-day" target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>

  • Donated An Entire Store To Charity

    When a Kmart in Kentucky was shutting its doors for good, resident and local businessman <a href="http://www.huffingtonpost.com/2012/05/17/rankin-paynter-greatest-person_n_1523818.html?ref=greatest-person-of-the-day" target="_hplink">Rankin Paynter</a> had an idea for all the merchandise that wouldn't sell in time: He bought it, and donated everything to charity. A grand act -- but one Paynter explained simply: "It's time to give back," he said. Read the whole story, <a href="http://www.huffingtonpost.com/2012/05/17/rankin-paynter-greatest-person_n_1523818.html?ref=greatest-person-of-the-day " target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>

  • Gives Shoes To Sick Kids

    "From my heart to your sole" is the motto <a href="http://www.huffingtonpost.com/2012/05/11/madison-steiner-peachs-neet-shoes_n_1509602.html?ref=greatest-person-of-the-day" target="_hplink">Madison Steiner</a> lives by. Her nonprofit, <a href="http://peachsneetfeet.com/" target="_hplink">Peach's Neat Feet</a>, gives away an average of 50 hand-decorated, individualized shoes each month to children living with debilitating or life-threatening conditions. Her kindness has garnered national attention, but Steiner insists she's the one finding inspiration from the children. "They're fighting for their life and if I can do one small thing for them," Steiner said, "I'm going to." Read the whole story, <a href="http://www.huffingtonpost.com/2012/05/11/madison-steiner-peachs-neet-shoes_n_1509602.html?ref=greatest-person-of-the-day" target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>

  • Built Safe Place For Homeless LGBTQ

    When Ali Forney, a homeless gay teenager in New York City, was murdered, Carl Siciliano was outraged -- and moved to action. He started the <a href="http://www.aliforneycenter.org/" target="_hplink">Ali Forney Center</a> in the teenager's memory, a place where LGBTQ teenagers can find safety and refuge. "I was devastated when he died, but ultimately, I felt that the gay community had failed, because no one was doing anything about it," <a href="http://www.huffingtonpost.com/2011/07/26/carl-siciliano-shelter-lgbt-youth_n_910388.html?ref=greatest-person-of-the-day" target="_hplink">Siciliano said</a>. "Here we were as a movement, encouraging kids to come out ... and kids were doing so and being treated like garbage." Read the whole story, <a href="http://www.huffingtonpost.com/2011/07/26/carl-siciliano-shelter-lgbt-youth_n_910388.html?ref=greatest-person-of-the-day" target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>

  • Provides Wheelchairs For Disabled Iraqi Children

    Brad Blauser moved to Iraq to work as a civilian in an Army supply warehouse -- and ended up staying for the children's sake. Blauser saw the lack of wheelchairs and crutches for disabled Iraqi children, and began fundraising on their behalf. So far, his organization, <a href="http://www.wheelchairsforiraqikids.com/" target="_hplink">Wheelchairs for Iraqi Kids</a>, has outfitted 985 Iraqi children with wheelchairs. Read the whole story, <a href="http://www.huffingtonpost.com/2011/02/07/on-the-ground-in-iraq-ser_n_819948.html?ref=greatest-person-of-the-day" target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>

  • Provides 5 Million Safer Stoves For The Poor

    Three billion impoverished individuals and families around the world still use a product that is both physically and environmentally harmful: open fires for cooking. <a href="http://www.huffingtonpost.com/2011/07/06/paradigm-project_n_891715.html?ref=greatest-person-of-the-day" target="_hplink">Greg Spencer Jr.</a> and the Paradigm Project are hoping to change all that by providing 5 million of those people with cook stoves. Read the whole story, <a href="http://www.huffingtonpost.com/2011/07/06/paradigm-project_n_891715.html?ref=greatest-person-of-the-day" target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>

  • Donated One Million Socks To Needy

    <a href="http://www.huffingtonpost.com/2011/07/07/documenting-new-poor-us_n_892638.html?ref=greatest-person-of-the-day" target="_hplink">Emily DeScalo</a> graduated college in 2011 and took a road trip -- perhaps unlike other excited and newly freed 20-somethings. DeScale drove across country for a film about America's "new poor." On the way, she and the rest of the film crew hoped to provide one million pairs of socks to the needy -- an often overlooked item when it comes to clothing donations. "We're growing personally and this is something that we'll continue doing," <a href="http://www.huffingtonpost.com/2011/07/07/documenting-new-poor-us_n_892638.html?ref=greatest-person-of-the-day" target="_hplink">DeScalo said.</a> "This is what life's about. When you see how you can affect someone else's life, it's amazing. Read the whole story, <a href="http://www.huffingtonpost.com/2011/07/07/documenting-new-poor-us_n_892638.html?ref=greatest-person-of-the-day" target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>

  • Saved A Woman, Inspired By His Son

    A year after <a href="http://www.huffingtonpost.com/2012/05/07/chris-cox-saves-woman_n_1495716.html?ref=greatest-person-of-the-day" target="_hplink">Chris Cox</a>'s son, Danny, was killed in a car accident, the California resident was being honored by the American Red Cross for pulling a woman out of her burning vehicle. But Cox said Danny, who wanted to be a firefighter before a diving accident left him paralyzed, was the real inspiration. "I thought, 'I'm doing this for you, buddy. This is what you wanted to do.'" Read the whole story, <a href="http://www.huffingtonpost.com/2012/05/07/chris-cox-saves-woman_n_1495716.html?ref=greatest-person-of-the-day" target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>

  • Provides Education For Somali Refugees

    When <a href="http://www.huffingtonpost.com/2011/03/26/hodan-guled-safe_n_840975.html?ref=greatest-person-of-the-day" target="_hplink">Hodan Guled</a> and her family fled Somalia as the civil war broke out in 1991, the importance of her education and the opportunities she was afforded in America became more and more apparent. Grateful for her upbringing, Guled wanted other Somali refugees to have her same opportunities -- so she started the <a href="http://www.safeeducation.org/" target="_hplink">Somali and American Fund for Education</a>. "Education is key to breaking the vicious cycle of war and poverty in Somalia," Guled said. Read the whole story, <a href="http://www.huffingtonpost.com/2011/03/26/hodan-guled-safe_n_840975.html?ref=greatest-person-of-the-day" target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>

  • Works With Ecuadorian Farmers For Fair Trade

    As a 6-year-old, Austin, Texas resident <a href="http://www.huffingtonpost.com/2011/08/25/eliot-logan-hines-rainforest_n_937281.html?ref=greatest-person-of-the-day" target="_hplink">Eliot Logan-Hines</a> told himself he'd save the rainforest. Years later, he's doing it: Logan-Hines graduated from the Yale School of Forestry and Environmental Studies, moved to Ecuador, and became executive director of the <a href="http://www.fundacionruna.org/" target="_hplink">Runa Foundation</a> -- an organization which works with local farmers to produce fair-trade commodities while focusing on environmental preservation. Read the whole story, <a href="http://www.huffingtonpost.com/2011/08/25/eliot-logan-hines-rainforest_n_937281.html?ref=greatest-person-of-the-day" target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>

  • Decreases Child Malnutrition In Malawi

    <a href="http://www.huffingtonpost.com/2011/07/28/huffpost-greatest-person-mark-manary_n_912726.html?ref=greatest-person-of-the-day" target="_hplink">Dr. Mark Manary</a> and his wife Mardi moved to Malawi with a big goal: To help fight child malnutrition. After several tries, they were successful, implementing the Peanut Butter Project -- a high-calorie, locally-produced food with a consistency similar to peanut butter. They saw drastic changes in the health and well-being of the children they were helping. Read the whole story, <a href="http://www.huffingtonpost.com/2011/07/28/huffpost-greatest-person-mark-manary_n_912726.html?ref=greatest-person-of-the-day" target="_hplink">here</a>. <em>Read about even more everyday heroes, or nominate one <a href="http://www.huffingtonpost.com/news/greatest-person-of-the-day" target="_hplink">here</a>.</em>