Sports events or individual trips are sometimes marketed as raising money for charity, e.g. run for a cure of some disease, cycling across the country to attract donations, climbing a mountain to draw attention and resources to an issue. While these are better than doing nothing, a more efficient way to exercise and raise money and awareness is to do useful work. Instead of running or cycling a prepared route, deliver packages for free (be a volunteer bike courier or postal worker). Other kinds of exercise useful to someone are loading cargo (lifting), stocking shelves in a charity shop, scrubbing and mopping in a shelter, picking up litter in public areas, shovelling snow, digging for public works such as repairing underground pipes. When done as rapidly as possible, these can be quite intense sports.
Most of such physical labour can also be done collaboratively, which may be more fun than an individual sport such as running or cycling. Competing on the speed and quality of the work is also possible.
The work may help the charitable cause directly. For example, delivering tissue samples from a collection point to a lab contributes to cancer research, lifting patients between stretchers and beds benefits a hospital. Building, maintaining and cleaning a shelter for a vulnerable group is an obvious way to help, as are stocking shelves, moving supplies and digging for construction and maintenance.