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Trial registered on ANZCTR

Registration number

ACTRN12610000295044

Ethics application status

Approved

Date submitted

10/04/2010

Date registered

13/04/2010

Date last updated

11/10/2016

Type of registration

Retrospectively registered

Titles & IDs

Public title

Health benefits of high intensity exercise for populations at risk of diabetes and cardiovascular disease

Scientific title

Can adults at risk of cardiovascular disease and diabetes who undertake short sessions of group based high intensity activities, achieve similar changes to their rate of oxygen consumption during maximal activity (VO2 max) over twelve weeks when compared to subjects undertaking a standard walking programme.

Secondary ID [1]

nil

Universal Trial Number (UTN)

Trial acronym

HITS (High Intensity Training Study)

Linked study record

Health condition

Health condition(s) or problem(s) studied:

Cardiovascular risk

Diabetes risk

Condition category

Condition code

Cardiovascular

Coronary heart disease

Metabolic and Endocrine

Diabetes

Intervention/exposure

Study type

Interventional

Description of intervention(s) / exposure

There are two seperate invervention groups and a comparator group ie three groups in total. Both intervention groups will undertake three walking based exercise prescriptions per week for twelve weeks consisting of either i) maximal volitional activity (Maximal Volitional Intensity Training group or MVIT)or ii) high intensity activity (High Intensity Intermittent Training group or HIIT). There will be an incremental increase in the MVIT exercise prescriptions over the twelve week study but estimated duration of the intervention per session (including warm up and cool down periods) for both intervention groups is about 30 minutes.

The exercise classes will be led by applied science students under the supervision of exercise physiologists. The applied science students will have received prior training in the administration of exercise prescriptions, from the relevant exercise physiologists.

The MVIT participants will undergo a minimum of three maximal volitional intensity (ie 'all out') exercises of 30 seconds duration, building up to up to six repetitions of 45 seconds. The HITT participants will undertake four 4 minute exercises at an intensity of 85-95% peak heart rate, interspersed with three recovery periods of three minutes at 65-75% peak heart rate.

Intervention code [1]

Lifestyle

Intervention code [2]

Prevention

Comparator / control treatment

Three walking based low intensity endurance exercise prescriptions per week for twelve weeks, of approximately 45 minutes duration per session (includiing warm up and cool down periods). Participants will be asked to walk at an intensity that achieves a heart rate (HR) that is 65-75% of their predicted peak HR.

The exercise classes will be led by applied science students under the supervision of exercise physiologists. The applied science students will have received prior training in the administration of exercise prescriptions, from the relevant exercise physiologists.

Control group

Active

Outcomes

Primary outcome [1]

VO2 max (ie rate of oxygen consumption during maximal activity)assessed by a maximal treadmill test using a modified Bruce protocol with on line gas analysis.

Timepoint [1]