Lab intervention 1: On day 5 of the experimental period (intervention day), participants will arrive at the Diabetes Clinic (Ayr hospital) at 08:00 h after an overnight fast. Prof. A Collier (Chief Investigator) and the researchers will meet with participants at the reception. The participant will be seated from 08:00 h to 09:00 h, to achieve a physiological steady state, in the consulting room (private room). During this period, an intravenous catheter will be inserted into an antecubital vein for hourly blood collection by clinicians (two clinical teaching fellows) and, the researcher will explain the procedure and offer choices of entertainment (e.g. TV, DVD, Books and Magazine). At 09:00 h, the participant will consume a standardised meal/breakfast (weetabix 52 grams plus 250ml full fat milk = 50grams of carbohydrates or cornflakes 45.4 grams plus 250ml full fat milk = 50 grams of carbohydrates). After that the participant will perform 3 min of light intensity walking (LIW) either every 60 minutes (Intervention A), 30 minutes (Intervention B) or 15 minutes (Intervention C) of sitting on a motorised treadmill with a pace of 3.2 km/h. This sequence will continue until the end of the intervention (16:00 h). Timing will be done by the researcher who will be in the room with participant. The researcher will instruct the participant to stand and walk on the treadmill as per the timing of the specific condition. The participant will be guided to the treadmill which will be started slowly by the researcher and this will increase to 3.2 km/h. At the end of the walking period, the researcher will slowly decrease the speed until the participant comes to steady standing. The participant will then be instructed to resume the sitting position. Every hour the clinicians (two clinical teaching fellows) will collect 12 ml of blood samples from patients through the inserted catheter. This sequence will be repeated until the condition is completed.