I go none stop for hours (10 +) doing trail maintenance. SUSTAIN X makes it feel like minutes! I couldn’t carry on at 62 if it wasn’t for Sir Matt.
I really like the Sustain X for 60-90 minute more intense activity. Actually pretty great for lifting as well. Then I use Sustain Elite for longer runs. You can't go wrong with either one.
Sustain elite x is perfect for those extra long runs. Supplying the body with everything it needs to keep going strong. And It’s also nice to my stomach so I don’t feel like I have to use the restroom. It’s a must have in your arsenal for running ultras. Or any other sport that requires to be out-here for long periods of time.