Conditions: Peripheral Arterial Disease Type II Diabetes Mellitus
Keywords: Cardiovascular Diseases Vascular Diseases Arterial Occlusive Diseases Diabetes Exercise Functional Capacity
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 18
Healthy volunteers: no

Brief summary:
The hypothesis of this proposal is that in subjects with Type II diabetes mellitus (T2D) and peripheral arterial disease (PAD) with intermittent claudication (IC), regular consumption of a high nitrate supplement which raises plasma nitrite, in conjunction with 12 weeks of supervised exercise training at the limb ischemic threshold (SET) will produce a greater clinical benefit (increases in claudication onset time \[COT\] and peak walking time \[PWT\] relative to a group with the same exercise training but supplemented with placebo .This study is essentially exploratory in nature and designed to provide us with information to adequately develop power and execute a larger study. We have previously seen benefits from nitrate supplementation on function in PAD.

Detailed description:

Arms:
arm 1: Subjects consume 70 ml of Beetroot Juice (Beet-It Stamina Shot) to assess acute effects of beverage supplementation at the start (between Testing Visits 1 \& 2) and at the end of the trial (between Visits 3 \& 4). It also allows for comparisons of the combination of beetroot juice and chronic training effects (between Visits 2 \& 3) to when the subject has not consumed the beverage (Visits 1 \& 4). All subjects will consume Beet-It Stamina Shot 3 hours prior to all beverage tolerance visits, Testing Visits 2 \& 3 and for all supervised exercise training visits during the 12 week intervention. arm 2: Subjects consume 70 ml of Beetroot Juice (Beet-It Stamina Shot; Placebo) to assess acute effects of beverage supplementation at the start (between Testing Visits 1 \& 2) and at the end of the trial (between Visits 3 \& 4). It also allows for comparisons of the combination of placebo beverage and chronic training effects (between Visits 2 \& 3) to when the subject has not consumed the beverage (Visits 1 \& 4). All subjects will consume Beet-It Stamina Shot (Placebo) 3 hours prior to all beverage tolerance visits, Testing Visits 2 \& 3 and for all supervised exercise training visits during the 12 week intervention.

Interventions: intervention 1: Beetroot Juice (Beet-It Stamina Shot) and Exercise Training intervention 2: Placebo Comparator Beverage (Beet-It Stamina Shot) & Exercise Training
Intervention descriptions: intervention 1: The beverage is high in inorganic nitrate and bottled and supplied by James White Drinks. This supplement will be used in conjunction with supervised exercise training. intervention 2: The beverage is identical in look and taste to Beet-It Stamina Shot but with active ingredient removed. It is also bottled and supplied by James White Drinks. This placebo supplement will be used in conjunction with supervised exercise training.

Protocol document: