YORKSHIRE Water is urging people to take up a free alternative the gym - a walk round the reservoir.
Bosses say the sites are the ideal way to shed the extra pounds gained during the festive period.
Scenic walks can be taken at many of the company's 141 reservoirs.
Spokesman David Simister said: "Unlike other forms of fitness, walking can involve all the family, regardless of age, and can fit in with any lifestyle.
"With no joining fee or monthly membership charge, a walk around a reservoir is far cheaper and more enjoyable than a session in the gym as you can take in the scenery and enjoy the wildlife."
Maps and walk information are available for download at www.yorkshirewater.com