Garmin dominates the running tech space, and their watches are virtually ubiquitous among serious runners. But their training plans for marathon runners require some tweaking.

Weighted vests can improve your cardio and help you build strength and a stronger core. They're also a great way to freshen up your fitness routine.

Doing cardio exercises each week can help you keep fit but some activities, like running and rowing, are better if you’re looking to burn calories.