I still bet a load of rich amateurs with weak little legs splurge a little of their wealth on these, when the money could be spent to better effect in various other areas.
If they also spend on trick wheels, wind tunnel sessions, coaching and 3-week spring training camps, your problem with them comes down to envy :-)
If they also spend on trick wheels, wind tunnel sessions, coaching and 3-week spring training camps, your problem with them comes down to envy :-)