Table 1.

Assessment of current techniques to detect muscle glycogen in athletes.

Glycogen Assessment Techniques	Portable?	Accuracy	Real-Time?	Non-Invasive?	Size?	Time of Measurement	Cost
Modified Bergström Muscle Biopsy/Assay	Yes	High	No	No	The Bergström needle (5 mm)	days	Low
Magnetic resonance spectroscopy	No	High	No	Yes	Height 200 cm approx.	min/h	High
					Width 199 cm approx.
Musculoskeletal high frequency ultrasound	Yes	Low	Yes	Yes	Height 121 cm approx.	min	Moderate
					Width 40 cm approx.