ICU sedation, delirium & recovery

Nutrition and Exercise in Critical Illness (NEXIS) trial: randomized trial of combined in-bed cycling and intravenous amino acid plus usual care

Am J Respir Crit Care MedPublished Randomised controlled trial

Primary result · 6MWDResult — go to the resultMedian difference 10 95% CI −75 to 84
  • stopped early due to slow recruitment

Authors' conclusion

Among patients with ARF, a combined intervention of early in-bed cycling and amino acid supplementation appeared safe but did not improve 6MWD or secondary outcomes during hospitalization or 6-month follow-up.

Study context

Population
ICU patients with acute respiratory failure (>90% mechanically ventilated)planned 128
Participants
115 patients
Comparison
In-bed cycling plus IV amino acid plus usual care vs usual care alone
  • Interventionn = 60
  • Controln = 55reference
Primary endpoint
6-minute walk distance (6MWD), blinded assessment
Follow-up
Hospital discharge
Methodological detailsmulticentre, phase 2, blinded outcome assessment, Cycling 40 ± 7 min/d (control: 0 min/d); total protein intake 1.9 ± 0.6 g/kg/d (control: 0.9 ± 0.6)
  • Multicentre
  • Phase 2
  • Blinded outcome assessment
  • Cycling 40 ± 7 min/d (control: 0 min/d); total protein intake 1.9 ± 0.6 g/kg/d (control: 0.9 ± 0.6)

Primary result

6MWD

Median difference

10

95% CI −75 to 84

P = 0.51

By group

Intervention vs Control
median difference 10 (95% CI −75 to 84); P = 0.51

As reported in the abstract

Secondary outcomes

Secondary outcomes (functional measures at ICU and hospital discharge, 6-month phone surveys)

Similar between groups

Safety

No evidence of safety concerns

Original publication

Nutrition and Exercise in Critical Illness (NEXIS) trial: randomized trial of combined in-bed cycling and intravenous amino acid plus usual care. Am J Respir Crit Care Med. Published 13 July 2026. doi:10.1093/ajrccm/aamag287

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