. 2020 Mar 30;12:22. doi: 10.1186/s13102-020-00167-y

Table 2.

High intensity interval training in adults with cystic fibrosis

Study	Population	Interval exercise	Continuous exercise	Frequency and duration
Gruber [38] n = 23 2014	Adults (medically stable inpatients)	1: 2 work recovery ratio (30 s: 60 s, 20 s: 60 s if more deconditioned) on a treadmill. Speed 3 to 4 km/hr. (work) and 50% incline, 0% incline (active recovery) Duration: 16 min (10 interval bouts)	Various sport activities depending on fitness level (i.e. walking, ball games, stretching, balance training and resistance training). HR corresponding 80–90% equivalent to 60 to 75% VO_2peak (unmatched workload between groups) Duration: 45 min	5 times x week for 6 weeks
Kaltsakas [65] n = 24 2017	Adults	30 s 100% W_max interspersed with 40% W_max for 30 s Duration: 30 min	70% W_max (matched workload between groups) Duration: 30 min	12 weeks (frequency per week not provided)

Study

Population

Interval exercise

Continuous exercise

Frequency and duration

Gruber [38]

n = 23

2014

Adults (medically stable inpatients)

1: 2 work recovery ratio (30 s: 60 s, 20 s: 60 s if more deconditioned) on a treadmill. Speed 3 to 4 km/hr. (work) and 50% incline, 0% incline (active recovery)

Duration: 16 min (10 interval bouts)

Various sport activities depending on fitness level (i.e. walking, ball games, stretching, balance training and resistance training). HR corresponding 80–90% equivalent to 60 to 75% VO_2peak (unmatched workload between groups)

Duration: 45 min

5 times x week for 6 weeks

Kaltsakas [65]

n = 24

2017

Adults

30 s 100% W_max interspersed with 40% W_max for 30 s

Duration: 30 min

70% W_max

(matched workload between groups)

Duration: 30 min

12 weeks (frequency per week not provided)

Abbreviations: CI confidence interval, HR heart rate, W_max maximal work rate