Final answer:
The next step in resuscitation for an infant with a heart rate below 60 BPM despite adequate positive pressure ventilation is to provide chest compressions, as per guidelines.
Step-by-step explanation:
The next step in resuscitation for a 26 weeks gestation infant who is now 2 minutes old, with a heart rate via pulse ox of 40 BPM and is limp with no respiratory effort, is to provide chest compressions. According to resuscitation guidelines, when an infant has a heart rate below 60 BPM despite adequate positive pressure ventilation for at least 30 seconds, chest compressions are indicated. Compressions should be coordinated with continued ventilation efforts to optimize resuscitation outcomes.