In accordance with standard procedure, Samus discarded all of the items she collected on previous adventures before embarking on this one. This run aims for 100% item collection in the fastest time.
Super Metroid has a wide variety of time-saving glitches to exploit, many of which are explained on the Super Metroid Tricks page.
The in-game completion time of this run is 00:37:54, but since game timers have never really been good at rounding things up, it is shown as 00:37 after the game has been completed.
If you prefer to watch the fastest completion without getting all the items, check out Super Metroid in 38:41 by Taco & Kriole.
The first streaming YouTube link leads to a high definition encode without input display. There is a second video encode that shows the gamepad input over the game video. The author has hidden some secret messages in it that might be interesting to see!