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Table 3 Serum IGF-1 and insulin levels for WP and CHO.

From: Ingestion of 10 grams of whey protein prior to a single bout of resistance exercise does not augment Akt/mTOR pathway signaling compared to carbohydrate

Variable

Time Point

WP

CHO

p-value

IGF-1 (ng/ml)

Baseline

0.46 ± 0.4

0.39 ± 0.3

Supplement (S) = 0.64

 

30 min post-ingestion

0.47 ± 0.4

0.45 ± 0.4

Test (T) = 0.34

 

15 min post-exercise

0.44 ± 0.5

0.39 ± 0.3

S × T = 0.89

 

120 min post-exercise

0.50 ± 0.4

0.44 ± 0.3

 

Insulin (μIU/ml)

Baseline

12.83 ± 6.1

14.05 ± 7.1

Supplement (S) = 0.95

 

30 min post-ingestion

51.90 ± 25.3

50.59 ± 34.9

Test (T) = 0.001†¥#

 

15 min post-exercise

23.60 ± 14.1

14.62 ± 8.9

S × T = 0.76

 

120 min post-exercise

10.08 ± 6.5

9.33 ± 5.5

 
  1. Data are means ± standard deviations.
  2. † represents significant difference from baseline at 30 min post-ingestion.
  3. ¥ represents significant difference from baseline at 15 min post-exercise.
  4. # represents significant difference from baseline at 120 min post-exercise.