Table 2. Characteristics of the studies, including sample, training, intervention time (weeks), and main results.

Authors	Sample (n)	Age	Periodization	Weeks	Main results
Wróbel et al., 2018	11	35 ± 6	5 exercises 5 sets, 10 to 15 repetitions, 50% 1 MR (2 min interval)	12	Tendency to increase in VO2max, without altering the HRmax, suggests benefit to cardiorespiratory system. Downward trend in HbA1c with no statistical significance.
Petschnig et al., 2020	11	11 ± 0.8	Start with 30% 1 MR, intensity changed every 15 days. Circuit of 20-40 min of training, 8 stations, 180 s of rest. Each exercise lasted 25-40 s, with 40 to 30 s of rest.	32	Increased strength of upper and lower limbs. Significant reduction in HbA1c after 32 weeks. Reduction in blood glucose after training sessions and increase in adiponectin.
Salem et al., 2010	75	14.7 ± 2.2	1 x 10 repetitions x 50%load of 10 MR + 10 repetitions x 75% load of 10 MR + 10 repetitions x 100% load of 10 MR (2 min break)	24	Significant improvement in HbA1c. Decreased insulin requirement, reduced BMI and waist circumference. Elevated concentrations of HbA1c associated with increased LDL, cholesterol, and TGD. No change in hypoglycemic episodes, or BP, only in diastolic BP.
Toghi-Eshghi and Yardley, 2019	12	31.3 ± 8.9	7 exercises, 3 sets, 8 repetitions, 100 % 8 MR (90 s of rest)	12	Increased blood glucose with exercise on an empty stomach and decreased in the afternoon. After 60 minutes, fasting blood glucose was significantly higher than in the afternoon. Greater variability in blood glucose after exercise performed on an empty stomach. Tendency to increase in HbA1c.
Ramalho et al., 2006	6	19.8 ± 5.1	8 exercises, 3 sets, 8-12 repetitions, 60-80% 1 MR (60 s break)	12	There was no change in the parameters evaluated, only a reduction in insulin dosage after exercise.

Source: The authors (2021).