active activity buoyancy buoyant canoe canoeing canoeists canoes canoing double-bladed-paddle effort exercise keeping-fit leisure leisurely movement moving outdoor outdoor-sports outdoors outside paddle paddle-blades paddling pastime recreation recreational risk risky river safety seated sport sunburn transport transportation travel water waves wet workout canoeist damp kayak kayaker kayaking perspiration perspiring sportsman sweat sweating adult boy canoists father foliage man outdoor-recreation riverside trees bicycle bicycles bike biking cycling fitness health person ride riding sports fit grass grassed area male monitor monitoring muscles muscular park path public public-park-path runner runners running running-shoes shade shadows shorts singlet sunlight sunshine