As with any exercise, if you're out of shape, have had back injuries in the past, or have a history of heart disease, check with your doctor before tackling that snowdrift.
When fellow passengers reported chest pains on two recent flights, cardiologist Eric Topol was able to check their heart rhythms with an electrocardiogram app on his iPhone called AliveCor.
If your business is government related, or you just want a peaceful location in the heart of town, check into the Capitol Hotel Tokyu in the Akasaka district, a popular holdover from the 1960s (the Beatles stayed here), which was razed and replaced with a 29-storey tower in 2010.