Type 2 Diabetes with Peripheral Neuropathy Starting a Strength Program
A 62-year-old woman with type 2 diabetes for 11 years wants to "tone up." Her medications are insulin glargine 30 units at bedtime, insulin lispro 6 units with meals, lisinopril, and atorvastatin. Her most recent HbA1c is 8.4%. Monofilament testing shows loss of protective sensation at both great toes, and vibration sense is reduced to mid-shin bilaterally. She has background retinopathy and no history of foot ulcer or amputation. She is sedentary, works a desk job, and has never lifted weights. Her goals are to carry groceries and climb stairs without stopping. On a treadmill she walks 10 minutes at 2.5 mph and 2% grade at RPE 12, then stops because of fatigue, not pain.
1. Design the first four weeks of training, including the glycemic monitoring rules you would use around each session.
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Program structure (weeks 1-2):
- Resistance training 2 days/week, nonconsecutive. Six exercises covering squat-to-chair, hip hinge with bodyweight, seated row, chest press, seated overhead press to pain-free range, and a calf raise with hand support.
- 1-2 sets of 10-15 reps at RPE 11-13, 90-second rest. Machines and bodyweight first; free weights once movement is consistent.
- Aerobic work 3-4 days/week, 10-15 minutes building toward 20-25 minutes at RPE 11-13, using walking or cycle.
- Balance work each session near a stable support.
Weeks 3-4: add a third set or a third resistance day if recovery is clean; progress load by small increments; extend aerobic duration before intensity.
Glycemic monitoring rules:
- Check glucose before every session.
- <100 mg/dL: ingest 15-30 g fast-acting carbohydrate and recheck before starting.
- 100-250 mg/dL: proceed.
250 mg/dL with symptoms, or >300 mg/dL: postpone and contact the care team.
- Recheck every 30 minutes during longer sessions, and check after exercise and at bedtime - delayed hypoglycemia can occur many hours later, particularly with a new training stimulus.
- Do not inject mealtime insulin into a limb that is about to be exercised; absorption changes.
- Keep fast-acting carbohydrate on site and know her hypoglycemia symptoms.
2. What foot-care and sensory-loss precautions would you build into the program, and how do they change exercise selection?
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Rationale: loss of protective sensation means she will not reliably feel friction, blisters, or pressure injury, and reduced vibration sense affects balance and proprioception.
Precautions:
- Inspect both feet before and after every session - soles, between toes, and over any bony prominence. Teach her to do this daily at home with a mirror.
- Properly fitted shoes with a closed toe and seamless socks; no barefoot or stocking-foot training, including on mats.
- Avoid prolonged repetitive impact and activities with high shear or friction (treadmill walking in worn shoes, step aerobics, jumping).
Exercise selection changes:
- Favor cycling, seated machine work, and supported standing work over high-impact or uneven-surface activity.
- Emphasize balance and proprioceptive training (single-leg stance with support, tandem stance, weight shifts) because sensory input is diminished.
- Progress walking volume gradually and check for hot spots, not just pain - she may not feel a developing blister.
- Do not use heat modalities or whirlpools, which risk burns in insensate feet.
3. What findings during the four weeks would make you stop the session or refer her to her care team?
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Stop the session immediately and refer if:
- Any new blister, callus breakdown, cut, or red area on the foot, or any change in foot color or temperature.
- Hypoglycemia below 70 mg/dL, or recurrent hypoglycemia despite the pre-exercise carbohydrate rule, or loss of her usual warning symptoms (hypoglycemia unawareness).
- Glucose >300 mg/dL with symptoms such as nausea, vomiting, or abdominal pain.
- Chest pain, unusual dyspnea, palpitations, or exertional dizziness.
- Sudden visual change - floaters, flashes, or vision loss - which could signal retinopathy progression and warrants ophthalmology referral.
Modify rather than refer if: fatigue limits duration (shorten and build), balance is limiting (add support), or motivation dips (renegotiate goals toward grocery carrying and stair climbing). Document each decision and the referral trigger in the chart so the pattern is visible to the care team.